SCIENCE
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Ask Ethan: Could gravitational waves collapse into a black hole?
Gravitational waves carry enormous amounts of energy, but spread out quickly once they leave the source. Could they ever create…
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Astronomy’s secret weapon in the resolution wars: interferometry
The sharpest optical images, for now, come from the Hubble Space Telescope. A ground-based technique can make images over 100…
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Ask Ethan: Is the Universe finite or infinite?
The Universe’s history, from cosmic inflation to the Big Bang to the present, is known. But whether it’s infinite or…
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The Milky Way’s stars are gradually being ejected
Known as hypervelocity stars, we originally thought just one would be ejected every 100,000 years. The real number is much…
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After 13.8 billion years, why hasn’t the Big Bang faded away?
Although the Big Bang occurred at an instant in time long ago, we still see the light from it. Will…
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