SCIENCE
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Supermassive black holes launch the most powerful cosmic jets
From within our own galaxy to behemoths billions of light-years away, supermassive black holes create jets like nothing else in…
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Ask Ethan: How can ultra-distant galaxies move so fast?
It takes incredible energies to accelerate masses near the speed of light. So how do the farthest galaxies speed away…
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The challenge of celebrating Artemis II as NASA cuts loom
NASA has just sent astronauts back to the Moon for the first time since 1972 with Artemis II. So why…
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Ask Ethan: What’s the biggest misconception in astronomy?
Many facts are well-known to professionals, but are unappreciated or even rejected outright by the public. “How stars work” takes…
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Only antimatter provides the energy we need for interstellar travel
Our dream of journeying to other star systems has a big obstacle to overcome: the vast interstellar distances. Can antimatter…
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Ask Ethan: How long does it take planets to form?
Every time a new star forms, there’s an opportunity to form planets alongside and around it. How does it happen,…
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Can you explain the strong nuclear force without colors?
“Color” with respect to the strong force is just an analogy. Here’s how to understand it without colors, group theory,…
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“One bad measurement” ruled out as Hubble tension explanation
The distance ladder and the CMB give incompatible values for the expansion rate. A new study shows just how robust…
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Ask Ethan: How did Artemis II break Apollo’s distance record?
Human beings have now traveled farther from Earth than ever before with Artemis II’s flyby of the lunar far side.…
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Astronomers just found the most pristine star of all-time
The 1st generation of stars formed, lived, and died very early on. But 2nd generation stars could still persist today.…
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