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The Milky Way’s stars are gradually being ejected
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 greater.
Ethan Siegel
Jun 19
Astronomers near a complete picture for how planets form
Astronomers near a complete picture for how planets form
Newborn stars are surrounded only by a featureless disk. Debris disks persist for hundreds of millions of years. So when do planets form?
Ethan Siegel
Jun 18
RIP Apollo 8 astronaut Bill Anders, who rediscovered Earth
RIP Apollo 8 astronaut Bill Anders, who rediscovered Earth
In December of 1968, human beings made their first-ever journey to the Moon aboard Apollo 8. Their most important discovery? Planet Earth.
Ethan Siegel
Jun 17
Starts With A Bang podcast #106 — the troublesome hunt for Planet Nine
Starts With A Bang podcast #106 — the troublesome hunt for Planet Nine
Out beyond Neptune are some fascinating bodies left over from our Solar System’s formation. Could one of them truly be spectacular?
Ethan Siegel
Jun 15
Ask Ethan: Why do matter and antimatter annihilate?
Ask Ethan: Why do matter and antimatter annihilate?
From forming bound states to normal scattering, many possibilities abound for matter-antimatter interactions. So why do they annihilate?
Ethan Siegel
Jun 14
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