The two spacecraft currently orbiting the two innermost planets are both flying low in their orbits in the final phases of their missions. MESSENGER just performed a rocket burn to raise its orbit slightly, while Venus Express did the opposite.
Venus Express, currently the only spacecraft orbiting our nearest planetary neighbor, will soon meet a fiery end in Venus' atmosphere. But its work isn't over yet. ESA will maneuver Venus Express to dip into the uppermost Venus atmosphere and study how the spacecraft responds to atmospheric pressure, giving ESA valuable experience in aerobraking.
She’s alive! She’s alive! Or is she? A little more than a week ago, at the Lunar and Planetary Science Conference 2014, evidence was presented that Venus was geologically active, not in the recent past, like 100,000 years ago, but right now.
Posted by Bruce Betts on 2014/03/06 10:49 CST
Continue exploring Venus and begin looking at Mars in this video of class 5 of Bruce Betts' Introduction to Planetary Science and Astronomy class.
Posted by Bruce Betts on 2014/02/28 01:30 CST
This video of class 4 of Bruce Betts' Introduction to Planetary Science and Astronomy class discusses eclipses, Mercury, Venus, and a comparison of the atmospheres of Venus, Earth, and Mars.
Earth's polar vortex has been in the American news all week. But we're not the only planet that has one; basically every world that has an atmosphere has a polar vortex. Here are lots of pretty pictures and animations of polar vortices.
With the New Year upon us, what can we look forward to in 2014? For me, the main event of 2014 is that ESA's Rosetta mission finally -- finally! -- catches up to the comet it has been chasing for a decade. We will lose LADEE, gain two Mars orbiters, and launch Hayabusa 2. The year begins with an amazing 24 spacecraft exploring or cruising toward various planetary destinations.
Cosmos with Cosmos Episode 4: Heaven & Hell
In which face the consequences of our own knowledge
Humans face the consequences of our own knowledge about the cosmos in this latest episode recap and analysis of Carl Sagan's classic series.
What Venus Express' Visual Monitoring Camera images of Venus have taught us about the motions of Venus' atmosphere.
This month, Opportunity is roving again, while Curiosity approaches Mars; Cassini's finally seeing rings, and will fly by Mimas, Titan, and Tethys; GRAIL has completed its primary mission and is journeying toward the second; Dawn is climbing to the HAMO2 orbit; and a rare transit of Venus is coming up on June 5/6.
Posted by Emily Lakdawalla on 2012/03/08 06:54 CST
Two brief mission updates. First, the good news: NASA announced yesterday that the twin GRAIL spacecraft have begun the science phase of the mission, transmitting precisely timed signals to each other in order to map the Moon's gravity field. The bad news: according to ESA, since the recent solar storm passed Venus, both of Venus Express' star trackers are suddenly unable to detect stars.
Posted by Emily Lakdawalla on 2011/04/07 11:16 CDT
Regular readers of this blog will find the content of today's 365 Days of Astronomy Podcast familiar, because it's an update on what the solar system exploration spacecraft are up to, based on my monthly "what's up" updates.
Posted by Emily Lakdawalla on 2011/03/31 03:59 CDT
April 2011 will see MESSENGER begin the science phase of its orbital mission at Mercury, and should, I think, also see the start of Dawn's approach observations of Vesta. At Mars, Opportunity is back on the road again, rolling inexorably toward Endeavour. At Saturn, Cassini will continue its focus on Saturn and Titan science.
Posted by Ted Stryk on 2011/03/10 11:11 CST
Wednesday morning included some interesting conversations. Notably, I spoke with Pamela Gay, who is responsible for the MoonZoo citizen science program and who is presently working on developing a site through which the public will be able to help search for potential Kuiper belt objects for the New Horizons mission to encounter after the Pluto flyby.
Posted by Emily Lakdawalla on 2010/09/23 12:12 CDT
Pioneer Venus discovered a stable "dipole" near Venus' north pole, and Venus Express found the same thing near Venus' south pole. Except now Venus Express has found it's not as stable as once thought.
Posted by Emily Lakdawalla on 2010/01/13 10:30 CST
2010 AL30 zipped past us harmlessly about five hours ago. Because of its one-year orbital period, many people speculated it might be a manmade object, but 2010 AL30 might, in fact, be artificial.