How do you study something invisible? This is a challenge facing astronomers studying the subject of darkness. Although dark matter contains 85 percent of all things in the universe, it does not interact with light. It can only be seen by the effect of gravity on light and other things. …
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The answers to many questions in astronomy are hidden behind the veil of deep time. One of those questions is about the role that supernovae played in the early Universe. The job of the first supernovae was to forge the heaviest elements that were not forged in the Big Bang. …
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What would the Sun look like as it plunged below the horizon on a long day (17 hours) on Uranus? Or what would an evening sunset on Mars look like when we finally got there? Thanks to some NASA computer models, these scenarios are now a little easier to imagine. …
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