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Several of Mars' giant Volcanoes were active as recently.
Researchers have discovered evidence of recent glacier movements and volcanic eruptions on Mars, overturning the long-held opinion that it's a cold, dead world. As recently as 350,000 years ago, glaciers moved from Mars' poles to its tropics, covering the planet in sheets of ice. And several of Mars' giant volcanoes were active as recently as 2 million years ago. The heat from these volcanoes could sustain microbial life in underground pools of liquid water.
An instrument on board the Mars Exploration rover Opportunity is malfunctioning, so mission controllers have decided to turn it off until they can figure out what's causing the problem. The problem is with its miniature thermal emission spectrometer (Mini-TES), which Opportunity uses to sense the mineral composition of distant rocks. The problem could be with a broken switch that helps position the mirror that directs Infrared light into the Mini-TES. Even if engineers can't figure out a solution, Opportunity can still return some science with the instrument partially functioning.
Astronomers have known since 1998 that a mysterious force seems to be accelerating the expansion of the Universe. An international team of Astronomers have observations from Hubble and a powerful computer simulation to find evidence of Dark energy much closer to home. The team studied the motion of our local group of Galaxies (40 Galaxies within 5 million light years) and found that you could only explain their current positions if you include the influence of dark energy.
NASA's Cassini spacecraft has made a surprising discovery about Saturn's Moon Enceladus: it has an atmosphere of water vapour. Cassini detected the atmosphere during both of its recent close flybys. scientists are sure what's causing this cloud of water vapour, but it could be caused by volcanoes, geysers, or gasses escaping from the moon's interior. Enceladus' gravity is very small, so it wouldn't be able to hold onto an atmosphere for very long. This means there must be some continuous source replenishing it.
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