On Earth, oxygen is a signature byproduct of life. But what if astronomers found oxygen in the atmosphere of a planet orbiting a distant sun? Would that prove life exists there? Not necessarily, says a new study.
Ultima Thule – a Kuiper Belt object and the most distant object yet seen by an earthly spacecraft – is now revealed as a “contact binary,” created when two small bodies in the early solar system stuck together.
The 1st results from ESA’s Trace Gas Orbiter mission at Mars have been released and – surprise – no atmospheric methane. That’s even though methane on Mars has been observed multiple times before. Where is it?