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Is it a dwarf planet, an asteroid or a comet?
When Guiseppe Piazzi reported his observations of a minor planet in 1801, he originally thought it might be a comet. But follow-up observations by fellow astronomers suggested that Ceres was actually an asteroid. So it’s somewhat ironic that the latest results from NASA’s Dawn mission suggest this asteroid is confusingly similar to a comet. Dawn […]
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The five most Earth-like exoplanets (so far)
I’ve lost count of the number of times I’ve read that the “first Earth-like exoplanet” has been discovered. With nearly 2000 exoplanets found to date, it is no wonder so many of them will resemble our planet in some way. But which exoplanets are similar enough to the Earth that they could actually be habitable? […]
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Rosetta: Surprising results from analysis of comet gases
New results from Ptolemy – the OU’s instrument on the Rosetta mission’s Philae lander – show a variance in gases coming off the comet’s surface at different locations. The new data helps researchers examine how comets are formed, and indicates that the comet was formed from different building blocks giving it a rich and diverse […]
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Water on Mars: evidence of glaciers similar to Earth’s
Researchers at University College Dublin (UCD) and The OU have found new evidence that liquid water flowed beneath a glacier on Mars, suggesting it had glaciers more like Earth’s than currently thought . The finding fuels the debate concerning Mars’ habitability and the burning question of whether other planets can sustain life. Dr Colman Gallagher […]
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NASA: streaks of salt on Mars mean flowing water, and raise new hopes of finding life
Salty streaks have been discovered on Mars, which could be a sign that salt water seeps to the surface in the summers. Scientists have previously observed dark streaks (see image above) on the planet’s slopes which are thought to have resulted from seeps of water wetting surface dust. Evidence of salts left behind in these […]
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