The fact that Mars used to have large amounts of liquid water on its surface is pretty much accepted among scientists, but there is still the question of how long that water lasted. How long ago was it still present? A billion years? A few million? New evidence based on data from the Mars Reconnaissance Orbiter (MRO) suggests that water was still on the surface within the past million years, perhaps even as recently as 500,000 years ago, which is indeed recent, geologically speaking.
For the first time, impact glass has been detected on the surface of Mars; the discovery not only provides new information about the formation of impact craters, but might even offer clues to the possibility of ancient life on the Red Planet. The discovery was made by the Mars Reconnaissance Orbiter (MRO) spacecraft.
While Curiosity and Opportunity are still busy roving Mars, NASA has begun testing its next lander, InSight, scheduled to launch in March 2016. It will be the first mission devoted to studying the interior of the Red Planet, providing a unique and necessary addition to the Mars exploration program overall.
Some great new images of very finely layered rocks near Jocko Butte on sol 976, from Curiosity. The layers tell a geological story of alternating wet conditions in this area on Mars a long time ago. These thin, delicate layers are an amazing sight! All of the raw images from Curiosity can be seen here.
The water vapour geysers on Saturn’s moon Enceladus are one of the most fascinating phenomena in the Solar System; the jets spray far out into space in a dazzling display unseen anywhere else. Known to emanate from the “tiger stripe” fissures at the south pole, they were thought to be separate, distinct plumes erupting from the surface, but now scientists think that they might actually be mostly broader, more diffuse “curtains” of spray along the length of the fissures.
Discovering new exoplanets has become rather routine in the last few years, but determining just what conditions exist on any of them is naturally more difficult, since they are so far away. But astronomers are making advances in this area as well, and now they have found the first evidence of changing temperatures – and possible volcanic activity – on a distant super-Earth exoplanet.