Researchers have discovered evidence that there's a lot more water on Mars - at least on parts of Mars - than anyone previously thought. Using new technology, scientists examined the water content in meteorites from the planet, and it points to a lot of it in the Martian mantle.
Imagine crawling out of bed and seeing a gigantic red Mars instead of the Sun. That's basically the situation for two newly discovered planets. Astronomers working with NASA's Kepler Mission recently found them 1,200 light years away, and they're 30 times closer than any pair of planets in our solar system. Actually, the scientists aren't totally sure how that happened - just another sign that our solar system is not the only way planets can be arranged.
Observatories the world over will be watching on Wednesday as Venus crosses the face of the sun for the last time in any of our lifetimes. It will be a banner day for astronomers, providing ample opportunities for measuring Venus' characteristics, and for determining some rules that will help in the hunt for exoplanets. But it's also just an amazing thing to behold, and you can watch it, too - as long as you follow some safety precautions.