Showing posts with label planet. Show all posts
Showing posts with label planet. Show all posts

Saturday, February 27, 2016

Discovery Channel Large Asteroid Impact Simulation YouTube

Discovery Channel Large Asteroid Impact Simulation YouTube




Discovery Channel Large Asteroid Impact Simulation

● Discovery Channel - Large Asteroid Impact Simulation (2008).

Earth was born as a result of repeated asteroid collisions, the moon was created by a single giant impact event. Then, Earth's size attracted huge meteorites, which slammed into it, causing super-high-temperature rock vapour to cover the entire surface and evaporate all ocean water. The earliest life-forms survived such infernal events by escaping deep into the ground, miraculously emerging again and again. The Earth has gone through innumerable catastrophic events, and life has survived by acquiring new abilities to live through each crisis. Humans are part of the grand history of life's evolution, which has been closely intertwined with repeated cataclysmic events.

Learn what would happen if an asteroid hit the Earth with this detailed "Large Asteroid Impact Simulation".
An asteroid with a diameter of 500 km. Destination: The Pacific Ocean. The impact peels the 10 km crust off the surface. The shockwave travels at hypersonic speeds. Debris is blasted across into low Earth orbit, and returns to destroy the surface of the Earth. The firestorm encircles the Earth, vaporizing all life in its way. Within one day, the surface of the Earth is uninhabitable. The evidence shows that this has happened at least six times in Earth's history.
Music of Pink Floyd "The Great Gig in the Sky" (1973).

0:12 An asteroid with a diameter of 500 km.
0:47 Destination: The Pacific Ocean.
1:17 The impact peels the 10 km crust off the surface.
1:28 The shockwave travels at hypersonic speeds.
1:53 Debris is blasted across into low Earth orbit,
2:11 and returns to destroy the surface of the Earth.
2:55 The firestorm encircles the Earth,
3:05 vaporizing all life in its way.
3:34 Within one day, the surface of the Earth is uninhabitable.
4:19 The evidence shows that this has happened at least six times in Earth's history.


● Discovery Channel - Simulazione di impatto con un asteroide di grandi dimensioni (2008).

La Terra è nata a seguito di ripetute collisioni di asteroidi, la luna è stata creata da un singolo impatto gigantesco. Poi, le dimensioni della Terra hanno attratto enormi meteoriti, che si sono schiantate su di essa, causando vapori di roccia ad altissima temperatura che hanno ricoperto l'intera superficie e fatto evaporare tutta l'acqua dell'oceano. Le prime forme di vita sono sopravvissute a tali eventi infernali fuggendo in profondità nel terreno, emergendo miracolosamente ancora e ancora. La Terra è passata attraverso innumerevoli eventi catastrofici, e la vita è sopravvissuta attraverso l'acquisizione di nuove capacità per vivere attraverso ogni crisi. Gli esseri umani sono parte della grande storia dell'evoluzione della vita, che è stata strettamente intrecciata con ripetuti eventi catastrofici.

Apprendi che cosa accadrebbe se un asteroide colpisse la Terra, con questa dettagliata "Simulazione di impatto con un asteroide di grandi dimensioni".
Un asteroide con un diametro di 500 km. Destinazione: l'Oceano Pacifico. L'impatto spella i 10 km di crosta via dalla superficie. L'onda d'urto viaggia a velocità ipersonica. I detriti vengono scagliati tutti in orbita terrestre bassa, e ritornano per distruggere la superficie della Terra. La tempesta di fuoco circonda la Terra, vaporizzando tutta la vita in questo modo. Entro un giorno, la superficie della Terra è inabitabile. Le prove dimostrano che questo è avvenuto almeno sei volte nella storia della Terra.
Musica dei Pink Floyd "The Great Gig in the Sky" (1973).

0:12 Un asteroide con un diametro di 500 km.
0:47 Destinazione: l'Oceano Pacifico.
1:17 L'impatto spella i 10 km di crosta via dalla superficie.
1:28 L'onda d'urto viaggia a velocità ipersonica.
1:53 I detriti vengono scagliati tutti in orbita terrestre bassa,
2:11 e ritornano per distruggere la superficie della Terra.
2:55 La tempesta di fuoco circonda la Terra,
3:05 vaporizzando tutta la vita in questo modo.
3:34 Entro un giorno, la superficie della Terra è inabitabile.
4:19 Le prove dimostrano che questo è avvenuto almeno sei volte nella storia della Terra.

Saturday, November 14, 2015

JUPITER PLANET HD WALLPAPER

JUPITER PLANET HD WALLPAPER

Jupiter Planet Jupiter is the fifth planet from the Sun and the largest in the Solar System. It is a giant planet with a mass one-thousandth that of the Sun, but two and a half times that of all the other planets in the Solar System combined. Wikipedia Radius: 69,911 km Mass: 1.898E27 kg (317.8 Earth mass) Distance from Sun: 778,500,000 km Gravity: 24.79 m/s² Surface area: 61,418,738,571 km² Moons: Europa, Io, Ganymede, Callisto, Amalthea, Carme, Pasiphae,
JUPITER PLANET WALLPAPER HD


    Jupiter
    Planet
    Jupiter is the fifth planet from the Sun and the largest in the Solar System. It is a giant planet with a mass one-thousandth that of the Sun, but two and a half times that of all the other planets in the Solar System combined. Wikipedia
    Radius69,911 km
    Mass1.898E27 kg (317.8 Earth mass)
    Distance from Sun778,500,000 km
    Gravity24.79 m/s²
    Surface area61,418,738,571 km²


Saturday, March 7, 2015

Universe Planet iphone 5 wallpaper

Universe Planet iphone 5 wallpaper:



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Date: Mar 2, 2015, 12:18 PM

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Thursday, March 5, 2015

Airglow Ripples over Tibet

Airglow Ripples over Tibet: APOD: 2014 September 1 - Airglow Ripples over Tibet


Discover the cosmos! Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer.

2014 September 1


See Explanation. Clicking on the picture will download the highest resolution version available.
Explanation: Why would the sky look like a giant target? Airglow. Following a giant thunderstorm over Bangladesh in late April, giant circular ripples of glowing air appeared over Tibet, China, as pictured above. The unusual pattern is created by atmospheric gravity waves, waves of alternating air pressure that can grow with height as the air thins, in this case about 90 kilometers up. Unlike auroras powered by collisions with energetic charged particles and seen at high latitudes, airglow is due to chemiluminescence, the production of light in a chemical reaction. More typically seen near the horizon, airglow keeps the night sky from ever being completely dark.

M6: The Butterfly Cluster

M6: The Butterfly Cluster: APOD: 2014 September 3 - M6: The Butterfly Cluster


Discover the cosmos! Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer.

2014 September 3



See Explanation. Clicking on the picture will download the highest resolution version available.
Explanation: To some, the outline of the open cluster of stars M6 resembles a butterfly. M6, also known as NGC 6405, spans about 20 light-years and lies about 2,000 light years distant. M6, pictured above, can best be seen in a dark sky with binoculars towards the constellation of the Scorpion (Scorpius), coving about as much of the sky as the full moon. Like other open clusters, M6 is composed predominantly of young blue stars, although the brightest star is nearly orange. M6 is estimated to be about 100 million years old. Determining the distance to clusters like M6 helps astronomers calibrate the distance scale of the universe.

Pillars and Jets in the Pelican Nebula

Pillars and Jets in the Pelican Nebula: APOD: 2015 March 4 - Pillars and Jets in the Pelican Nebula


Discover the cosmos! Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer.

2015 March 4


See Explanation. Clicking on the picture will download the highest resolution version available.
Explanation: What dark structures arise from the Pelican Nebula? Visible as a bird-shaped nebula toward the constellation of a bird (Cygnus, the Swan), the Pelican Nebula is a place dotted with newly formed stars but fouled with dark dust. These smoke-sized dust grains formed in the cool atmospheres of young stars and were dispersed by stellar winds and explosions. Impressive Herbig-Haro jets are seen emitted by a star on the right that is helping to destroy the light year-long dust pillar that contains it. The featured image was scientifically-colored to emphasize light emitted by small amounts of ionized nitrogen, oxygen, and sulfur in the nebula made predominantly of hydrogen and helium. The Pelican Nebula (IC 5067 and IC 5070) is about 2,000 light-years away and can be found with a small telescope to the northeast of the bright star Deneb.

The Mini-Moon Cometh: Catch the Smallest Full Moon of 2015 This Thursday

The Mini-Moon Cometh: Catch the Smallest Full Moon of 2015 This Thursday:



Credit and copyright:


The first known reference of a Mini-Moon? A perigee versus apogee Full Moon from 2011. Credit and copyright: Ken Lord.
Supermoons. Blood Moons. Moons both Black and Blue… by now, you’d think that there was nothing new under the Sun (or Moon, as it were) when it comes to new unofficial lunar terminology.

Sure, the Moon now seems more colorful than controversial viral dress shades. Love it or loathe it, the Internet can sure set a meme in motion. And this week’s Full Moon on Thursday evening offers up one of our faves, as the most distant Full Moon of 2015 occurs on March 5th. Yup, the Mini-Moon is indeed once again upon us, a time when the Full Moon appears slightly smaller than usual as seen from the Earth. But can you really tell the difference?

The third Full Moon of the year occurs this week on Thursday, March 5th. Also known as the Worm or Sap Moon by the Algonquin tribes of New England, the moment of Full phase occurs at 18:07 Universal Time (UT) or 1:07 PM Eastern Standard Time (EST). This is also just over 10 hours after apogee, which occurs at 7:36 UT/2:36 AM EST. This month’s apogee is also an exceptionally distant one, measuring 406,385 kilometres from the center of the Earth to the center of the Moon. This is just 80 kilometres shy of the most distant apogee of 2015 on September 14th, which occurs when the Moon is near New phase.



Stellarium


Can you spy Jupiter next to the waxing gibbous Moon before sunset tonite? Credit: Stellarium.
Apogee for the Moon ranges from 404,000 to 406,700 kilometres distant, and the Full Moon appears 29.3 arc minutes across near apogee versus 34.1’ across near perigee as seen from the Earth.

This is also the closest apogee near a Full Moon time-wise until January 27th, 2032.

What is a Mini-Moon? As with a Supermoon, we prefer simply defining a Mini-Moon as a Full Moon which occurs within 24 hours of apogee. That’s much more definitive in our book rather than the cryptic and often cited ‘within 90% of its orbit’ refrain for Supermoons.

And speaking of which, we’ve got three ‘Super’ Full Moons in 2015, with the very closest Super (Duper?) Full Moon occurring within an hour of perigee on September 28th during the final total lunar eclipse of the ongoing tetrad… what will the spin doctors of the Internet make of this? A ‘Super Duper Blood Moon,’ anyone?

The path of the Moon this week also takes it towards the Fall equinoctial point in the astronomical constellation of Virgo, as it crosses Leo and nicks the corner of the non-zodiacal constellation Sextans. The Moon reaches Full two weeks prior to the Vernal Equinox, which falls this year on March 20th. Keep an eye on the Moon, as the first eclipse of 2015 and this year’s only total solar eclipse also occurs just 13 hours prior to the equinox for observers in the high Arctic. (More on that next week).

Can’t wait til Thursday? Tonight, observers across Canada, northern Maine, and Europe will see a fine occultation of the star Acubens (a.k.a. Alpha Cancri) by the 94% illuminated waxing gibbous Moon:



Credit:


The ‘shadow footprint’ for tonight’s occultation of Acubens by the Moon. Credit: Occult 4.0.1.
Alpha Cancri is 175 light years distant, and folks living along the U.S./Canadian border will be treated to a fine grazing occultation as the double star plays hide and seek along the limb of the Moon. This is number 17 in an ongoing series of 21 occultations of the star by the Moon stretching out until June 20th, 2015. There’s a wide separation of 11” between the star’s A and B components, and there are suspicions from previous lunar occultations that Alpha Cancri A may itself be a double star as well.

We caught a similar occultation of the star Lambda Geminorum by the Moon this past Friday:



Ever feel sorry for moonless Venus? This Wednesday night also offers a chance to spy Venus with a brief ‘pseudo-moon,’ as +6th magnitude Uranus passes just 15’ — less than half the apparent diameter of a Full Moon — from brilliant -4th magnitude Venus. Neith, the spurious 18th century moon of Venus lives! From the vantage point of Venus on March 4th, the Earth and Moon would shine at magnitudes -2.3 and +1.5, respectively, and sit about 4 arc minutes apart.



Starry Night Education Software.


The rising Full ‘Mini-Moon’ of March 5th. Credit: Starry Night Education Software.
Does the rising Full Moon look smaller to you than usual this week? While the apparent change in diameter from apogee to perigee is slight, it is indeed noticeable to the naked eye observers. Remember, the Moon is actually about one Earth radius (6,400 kilometres) more distant on the local horizon than when it’s directly overhead at the zenith. The Moon is also moving away from us at a current rate of 1-2 centimetres a year, meaning that Mini-Moons will get ever more distant in epochs hence.

Already, annular solar eclipses are currently more common than total ones by a ratio of about 11 to 9. The first annular eclipse as seen from the Earth went unheralded some time about 900 million to a billion years ago, and 1.4 billion years hence, the last total solar eclipse will occur.



Photo by author.


The rising waxing gibbous Moon against the daytime sky. Photo by author.
Be sure to get out and enjoy the rising Mini-Moon later this week!

-Send those Mini-Moon pics in to Universe Today.

-Looking for eclipse sci-fi? Check out Dave Dickinson’s eclipse-fueled tales Exeligmos and Shadowfall.



About 

David Dickinson is an Earth science teacher, freelance science writer, retired USAF veteran & backyard astronomer. He currently writes and ponders the universe from Tampa Bay, Florida.

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Bright Spots on Ceres Likely Ice, Not Cryovolcanoes

Bright Spots on Ceres Likely Ice, Not Cryovolcanoes:



Ceres rotates in this sped-up movie comprised of images taken by NASA's Dawn mission during its approach to the dwarf planet. The images were taken on Feb. 19, 2015, from a distance of nearly 29,000 miles (46,000 kilometers). Dawn observed Ceres for a full rotation of the dwarf planet, which lasts about nine hours. The images have a resolution of 2.5 miles (4 kilometers) per pixel. Credit: NASA/JPL-Caltech/UCLA/MPS/DLR/IDA


Ceres rotates in this sped-up movie comprised of images taken by NASA’s Dawn mission during its approach to the dwarf planet. The images were taken on Feb. 19, 2015, from a distance of nearly 29,000 miles (46,000 kilometers). Dawn observed Ceres for a full rotation of the dwarf planet, which lasts about nine hours. The images have a resolution of 2.5 miles (4 kilometers) per pixel. Credit: NASA/JPL-Caltech/UCLA/MPS/DLR/IDA
As the Dawn spacecraft prepares to enter orbit around Ceres on March 6, the science team provided the latest images and a mission preview during a mission briefing on March 2. The images released yesterday show more of those unusual bright spots and lots of craters, and feature two new global views of Ceres: one spinning globe, and a a mosaic of a flat map-view of Ceres’ surface.

But the most-talked about feature is the 90-km-wide (57-mile) crater with two bright spots.

“These spots are extremely surprising and have been puzzling to the team and everyone that has seen them,” said Deputy Principal Investigator Carol Raymond. “The team is really, really excited about this feature because it is unique in the solar system.”

Raymond added that the team will be revealing the true nature of spots with the public in real time as the spacecraft gets closer and is able to make a determination.

So what is the leading theory on the bright spots?

(...)
Read the rest of Bright Spots on Ceres Likely Ice, Not Cryovolcanoes (999 words)


© nancy for Universe Today, 2015. |
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Post tags: ceres, dawn


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What is the Closest Galaxy to the Milky Way?

What is the Closest Galaxy to the Milky Way?:



Illustration of the Canis Dwarf Dwarf Galaxy, Credit:  R. Ibata (Strasbourg Observatory, ULP) et al./2MASS/NASA


Illustration of the Canis Dwarf Dwarf Galaxy and its associated tidal (shown in red) in relation to our Milky Way. Credit: R. Ibata (Strasbourg Observatory, ULP) et al./2MASS/NASA
Scientists have known for some time that the Milky Way Galaxy is not alone in the Universe. In addition to our galaxy being part of the Local Group — a collection of 54 galaxies and dwarf galaxies — we are also part of the larger formation known as the Virgo Supercluster. So you could say the Milky Way has a lot of neighbors.

Of these, most people consider the Andromeda Galaxy to our closest galactic cohabitant. But in truth, Andromeda is the closest spiral galaxy, and not the closest galaxy by a long shot. This distinction falls to a formation that is actually within the Milky Way itself, a dwarf galaxy that goes by the name of the Canis Major Dwarf Galax (aka. the Canis Major Overdensity).

(...)
Read the rest of What is the Closest Galaxy to the Milky Way? (933 words)


© mwill for Universe Today, 2015. |
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Post tags: 2MASS, accretion, Andromeda Galaxy, canis major dwarf galaxy, Cerro Tololo Inter-American Observatory, galaxies, infrared, Large Magellanic Cloud, M-Class Stars, M31, Mt. Hopkins Observatory, red dwarf, Sagittarius Dwarf Galaxy, Two-Micron All-Sky Survey


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Watch the Aurora Shimmer and Dance in Real Time

Watch the Aurora Shimmer and Dance in Real Time:



I for one have never witnessed the northern lights in person, and like many people I experience them vicariously through the photography and videos of more well-traveled (or more polar-bound) individuals. Typically these are either single-shot photos or time-lapses made up of many somewhat long-exposure images. As beautiful as these are, they don’t accurately capture the true motion of this upper atmospheric phenomenon. But here we get a look at the aurora as it looks in real time, captured on camera by Jon Kerr from northern Finland. Check it out above or watch in full screen HD on YouTube.

The video was shot with a full-frame mirrorless Sony a7S. See more of Jon’s aurora videos on YouTube here.

Video credit: Jon Kerr. HT SunViewer on Twitter.


© Jason Major for Universe Today, 2015. |
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Post tags: aurora, Earth, Finland, Jon Kerr, northern lights, photography, sky


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Wednesday, March 4, 2015

Earth Planet From Space

Earth Planet From Space:



Universe Planet 47-640x1136 wallpapers.jpg
Date: Jun 9, 2007, 10:55 PM

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Eclipse Solar

Eclipse Solar:



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Date: Sep 20, 2007, 10:32 PM

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Universe Planet Wallpaper

Universe Planet Wallpaper:



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Date: Mar 2, 2015, 12:18 PM

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Earth Map Jetplane Routes Wallpaper

Earth Map Jetplane Routes Wallpaper:



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Date: Jan 25, 2008, 6:10 PM

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Planet Space Eruption

Planet Space Eruption:



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Date: Mar 2, 2015, 12:19 PM

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Green Lights Planets Space

Green Lights Planets Space:



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M6: The Butterfly Cluster

M6: The Butterfly Cluster: APOD: 2014 September 3 - M6: The Butterfly Cluster


Discover the cosmos! Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer.

2014 September 3


See Explanation. Clicking on the picture will download the highest resolution version available.
Explanation: To some, the outline of the open cluster of stars M6 resembles a butterfly. M6, also known as NGC 6405, spans about 20 light-years and lies about 2,000 light years distant. M6, pictured above, can best be seen in a dark sky with binoculars towards the constellation of the Scorpion (Scorpius), coving about as much of the sky as the full moon. Like other open clusters, M6 is composed predominantly of young blue stars, although the brightest star is nearly orange. M6 is estimated to be about 100 million years old. Determining the distance to clusters like M6 helps astronomers calibrate the distance scale of the universe.

Cloud, Clusters and Comet Siding Spring

Cloud, Clusters and Comet Siding Spring: APOD: 2014 September 4 - Cloud, Clusters and Comet Siding Spring


Discover the cosmos! Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer.

2014 September 4
See Explanation. Clicking on the picture will download the highest resolution version available.
Explanation: On October 19th, a good place to watch Comet Siding Spring will be from Mars. Then, this inbound visitor (C/2013 A1) to the inner solar system, discovered in January 2013 by Robert McNaught at Australia's Siding Spring Observatory, will pass within 132,000 kilometers of the Red Planet. That's a near miss, equivalent to just over 1/3 the Earth-Moon distance. Great views of the comet for denizens of planet Earth's southern hemisphere are possible now, though. This telescopic snapshot from August 29 captured the comet's whitish coma and arcing dust tail sweeping through southern skies. The fabulous field of view includes, the Small Magellanic Cloud and globular star clusters 47 Tucanae (right) and NGC 362 (upper left). Worried about all those spacecraft in Martian orbit? Streaking dust particles from the comet could pose a danger and controllers plan to position Mars orbiters on the opposite side of the planet during the comet's close flyby.

A Sagittarius Starscape

A Sagittarius Starscape: APOD: 2014 September 5 - A Sagittarius Starscape


Discover the cosmos! Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer.

2014 September 5


See Explanation. Clicking on the picture will download the highest resolution version available.
Explanation: This rich starscape spans nearly 7 degrees on the sky, toward the Sagittarius spiral arm and the center of our Milky Way galaxy. A telescopic mosaic, it features well-known bright nebulae and star clusters cataloged by 18th century cosmic tourist Charles Messier. Still popular stops for skygazers M16, the Eagle (far right), and M17, the Swan (near center) nebulae are the brightest star-forming emission regions. With wingspans of 100 light-years or so, they shine with the telltale reddish glow of hydrogen atoms from over 5,000 light-years away. Colorful open star cluster M25 near the upper left edge of the scene is closer, a mere 2,000 light-years distant and about 20 light-years across. M24, also known as the Sagittarius Star Cloud, crowds in just left of center along the bottom of the frame, fainter and more distant Milky Way stars seen through a narrow window in obscuring fields of interstellar dust.