Mercury and Venus an Awesome Duo at Dusk

Sunday, January 11, 2015

Mercury and Venus an Awesome Duo at Dusk

Mercury and Venus an Awesome Duo at Dusk:

You couldn’t miss Mercury and Venus together last night January 9th 45 minutes after sunset in the southwestern sky. Very easy to see! They’ll be even closer tonight. Credit: Bob King

As Universe Today’s Dave Dickinson described earlier this week not only has Venus returned to the evening sky, but Mercury has climbed up from the horizon to join it. Last night (Jan. 9th) the two planets were separated by just a hair more than one Moon diameter. The photo only hints at amazingly easy the pair was to see. Consider the duo a tasty hors d’oeuvres before the onset of night and the Comet Lovejoy show.

Tonight the duo will be at their closest and remain near one another for the next week or so. This is one of Mercury’s best apparitions of the year for northern hemisphere skywatchers and well worth donning your winter uniform of coat, boots, hat and thick gloves for a look. Just find a location with a decent view of the southwestern horizon and start looking about a half hour after sunset. Mercury and Venus will be about 10° or one fist held at arm’s length high above the horizon.

Through a telescope both Venus and Mercury are in gibbous phase with Venus more fully filled out. Both are also very small with Venus about 10 arc seconds and Mercury 6 seconds across. Source: Stellarium

Through a telescope both Venus and Mercury are in gibbous phase with Venus more fully filled out. Both are very small with Venus about 10 arc seconds in diameter and Mercury 6 seconds. Source: Stellarium

Venus will jump right out. Mercury’s a couple magnitudes fainter and lies to the right of the goddess planet. By 45 minutes after sunset, Mercury gets even easier to see. Find your sunset time HERE so you can best plan your outing.

Mark your calendars for a cool conjunction of the 1-day-old lunar crescent, Mercury and Venus on January 21st. Source: Stellarium

Because both planets are still fairly low in the sky and far away, they present only tiny, blurry gibbous disks in the telescope. Later this spring, Venus will climb higher and show its changing phases more clearly. Keep watch the coming week to catch the ever-shifting positions of Venus and Mercury in the evening sky as each follows the binding arc of its own orbit. The grand finale occurs on January 21st when a skinny crescent Moon joins the duo (Mercury now fading) for a triumphant trio. Has this been an exciting month or what?

About Bob King

I'm a long-time amateur astronomer and member of the American Association of Variable Star Observers (AAVSO). My observing passions include everything from auroras to Z Cam stars. Every day the universe offers up something both beautiful and thought-provoking. I also write a daily astronomy blog called Astro Bob.

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The National Aeronautics and Space Administration (NASA) is the United States government agency responsible for the civilian space program as well as aeronautics and aerospace research. President Dwight D. Eisenhower established the National Aeronautics and Space Administration (NASA) in 1958 with a distinctly civilian (rather than military) orientation encouraging peaceful applications in space science. The National Aeronautics and Space Act was passed on July 29, 1958, disestablishing NASA's predecessor, the National Advisory Committee for Aeronautics (NACA). The new agency became operational on October 1, 1958.

UFO SIGHTINGS PHOTO PHOTOGRAPHY

The Oxford English Dictionary defines a UFO as "An unidentified flying object; a 'flying saucer'." The first published book to use the word was authored by Donald E. Keyhoe. The acronym "UFO" was coined by Captain Edward J. Ruppelt, who headed Project Blue Book, then the USAF's official investigation of UFOs. He wrote, "Obviously the term 'flying saucer' is misleading when applied to objects of every conceivable shape and performance. For this reason the military prefers the more general, if less colorful, name: unidentified flying objects. UFO (pronounced Yoo-foe) for short." Other phrases that were used officially and that predate the UFO acronym include "flying flapjack", "flying disc", "unexplained flying discs", "unidentifiable object", and "flying saucer". The phrase "flying saucer" had gained widespread attention after the summer of 1947. On June 24, a civilian pilot named Kenneth Arnold reported seeing nine objects flying in formation near Mount Rainier. Arnold timed the sighting and estimated the speed of discs to be over 1,200 mph (1,931 km/h). At the time, he described the objects' shape as being somewhat disc-like or saucer-like, leading to newspaper accounts of "flying saucers" and "flying discs". In popular usage the term UFO came to be used to refer to claims of alien spacecraft. and because of the public and media ridicule associated with the topic, some investigators prefer to use such terms as unidentified aerial phenomenon (or UAP) or anomalous phenomena, as in the title of the National Aviation Reporting Center on Anomalous Phenomena (NARCAP).

UFO PHOTO PHOTOGRAPHY

UFO - Unidentified Flying Object An unidentified flying object, or UFO, in its most general definition, is any apparent anomaly in the sky that is not identifiable as a known object or phenomenon. Culturally, UFOs are associated with claims of visitation by extraterrestrial life or government-related conspiracy theories, and have become popular subjects in fiction. While UFOs are often later identified, sometimes identification may not be possible owing to the usually low quality of evidence related to UFO sightings (generally anecdotal evidence and eyewitness accounts). Stories of fantastical celestial apparitions have been told since antiquity, but the term "UFO" (or "UFOB") was officially created in 1953 by the United States Air Force (USAF) to serve as a catch-all for all such reports. In its initial definition, the USAF stated that a "UFOB" was "any airborne object which by performance, aerodynamic characteristics, or unusual features, does not conform to any presently known aircraft or missile type, or which cannot be positively identified as a familiar object." Accordingly, the term was initially restricted to that fraction of cases which remained unidentified after investigation, as the USAF was interested in potential national security reasons and/or "technical aspects" (see Air Force Regulation 200-2). During the late 1940s and through the 1950s, UFOs were often referred to popularly as "flying saucers" or "flying discs". The term UFO became more widespread during the 1950s, at first in technical literature, but later in popular use. UFOs garnered considerable interest during the Cold War, an era associated with a heightened concern for national security. Various studies have concluded that the phenomenon does not represent a threat to national security nor does it contain anything worthy of scientific pursuit (e.g., 1951 Flying Saucer Working Party, 1953 CIA Robertson Panel, USAF Project Blue Book, Condon Committee).

Photos of Nature | Nature Photography What is The Universe

Photos of Nature | Nature Photography What is The Universe

Sunday, January 11, 2015