Huge double asteroid to pass safely May 25 | | Professional and amateur astronomers will be observing asteroid 1999 KW4 - oddly shaped, about a mile wide, with a companion moon - around its closest approach on May 25. Charts here for amateur observers across the globe. Read more. | | |
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How Venus and Mars can teach us about Earth | | One has a thick poisonous atmosphere, one has hardly any atmosphere at all, and one is just right for life to flourish. But it wasn’t always that way. The atmospheres of our 2 neighbors can teach us a lot about past and future scenarios for our own planet. Read more. | | |
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