Star mergers: A new test of gravity, dark energy theories

When scientists recorded a rippling in space-time, followed within two seconds by an associated burst of light observed by dozens of telescopes around the globe, they had witnessed, for the first time, the explosive collision ...

Video: Supersonic gas jets blast off

Supersonic gas jets sound like science fiction, but they are actually found throughout our solar system: for example, fast jets of sulfur dioxide stream from the surface of Jupiter's moon Io and water vapor sprays from the ...

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