Eric and Wendy Schmidt are backing a start-up-like approach to building a giant space telescope and powerful ground observatories. By Kenneth Chang After canceling a spacewalk planned for Thursday, ...

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If you’ve ever heard the sound of an aircraft passing overhead and looked at an online plane tracker to try and figure out ...

When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. On Jan. 11, 1787, the English astronomer Sir William Herschel discovered two moons at Uranus!