Starts With a Bang! 11 Aug 2020, 14:01 UTC There could have been life on Mars in the past, but that’s only the beginning of the story.
Centauri Dreams 11 Aug 2020, 12:03 UTC When it comes to detecting life on planets around other stars, my guess is that what will initially appear to be a life signature will quickly become controversial. We might, for example, find ozone in an exoplanet atmosphere with a space telescope like HabEX (Habitable Exoplanet Observatory). That would lead to hyperbolic news stories, to be sure, but ozone can happen when nitrogen and oxygen are exposed to ultraviolet light. The presence of ozone makes no definitive statement about life.
Starts With a Bang! 10 Aug 2020, 14:01 UTC It comes from a supernova seen just 33 years ago, and it doesn’t pulse.
EarthSky Blog 7 Aug 2020, 12:18 UTC Thanks to orbiting spacecraft, we’ve now seen thousands of channels on Mars. They look like river channels, and most Mars researchers see them as evidence of a warmer, wetter Mars in the distant past. But, in early August 2020, Mars researchers announced that many of the channels weren’t carved by flowing river water at all. Instead, these scientists claim, the channels are due to the flow of meltwater beneath glacial ice sheets that crawled over Mars’ surface long ago.
New Scientist 6 Aug 2020, 19:00 UTC The outermost layer of the sun, called the corona, is extraordinarily difficult to study, but now researchers have made the first map of its magnetic field. This will help us predict solar flares that potentially threaten Earth.