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The Atlas that went into orbit (see NATIONAL AFFAIRS) is technically called a 1½-stage rocket—a single engine plus ground-fired boosters. When its two booster engines stop firing, the main body, ...

We’ve likely had at least one close encounter of the 3I kind before. Harvard scientist Avi Loeb claims that not only does 3I/ATLAS potentially have alien origins, but that this wouldn’t be the first ...

This striking image from the science camera on ESA's Jupiter Icy Moons Explorer (Juice) shows interstellar comet 3I/ATLAS spewing dust and gas. The tiny nucleus of the comet (not visible) is ...