August 23, 2017

Mercury-Spotting during the First Elongation of 2013.

Mercury as seen by Messenger during its

3rd flyby in 2009.

(Credit: NASA/JPL).

I SEE IT! Catching a glimpse of fleeting Mercury can be an unforgettable experience; orbiting the Sun once every 88 days, the innermost planet never strays far from its perch low in the dawn or dusk sky. February offers your first shot at catching the world low in the dusk as it approaches its first of six elongations in 2013. Though not the best of 2013 for most viewers worldwide (see below), this month’s elongation does offer roughly equal prospects for both northern and southern hemisphere observers as the ecliptic approaches near-perpendicular to the horizon headed towards the March equinox. And as you’ll see, this apparition will set us up for some of the best prospects for catching Mercury later this spring. [Read more...]

17.03.11- Mercury: At Last!

Brave New World: Mercury as seen from Messenger during 2nd flyby departure.

 (Credit: NASA/Johns Hopkins University Applied Physics Laboratory/Carnegie Institution of Washington) 

Tonight marks a pivotal moment in solar system exploration. At 12:45 AM UTC on March 18th, NASA’s Mercury Messenger spacecraft will burn its engines for approximately 15 minutes to enter an elliptical orbit around the planet Mercury. Since its launch from Cape Canaveral on August 3rd, 2004, Messenger has flown by the Earth once and Venus twice for a gravitational assist, swung by the innermost world three times, sampled the near solar environment, searched for Vulcanoids, and even done a wide field pan for any tiny Mercury moonlets that may have been missed. [Read more...]