SCIENCE
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Ask Ethan: What’s the point of exploring the Universe?
There are so many problems, all across planet Earth, that harm and threaten humanity. Why invest in researching the Universe?…
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Supermassive black holes came before stars in ancient galaxies
Such massive, early supermassive black holes have puzzled astronomers for decades. At last, we’ve finally figured out how they form.…
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Ask Ethan: Is there really a “dark side” of the Moon?
One side of the Moon always faces us: the near side. The “dark side” of the Moon began as a…
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How are redshift, temperature, distance and time related?
Wavelengths stretch, distances grow, and temperatures cool as the Universe expands with time. How are the various cosmic parameters… Continue…
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Light and gravity travel at the same speed, but don’t arrive together | by Ethan Siegel | Starts With A Bang! | Nov, 2025
Press enter or click to view image in full size When two neutron stars merge, they always produce a gravitational…
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How the “meter” came to be exactly one meter long | by Ethan Siegel | Starts With A Bang! | Nov, 2025
Press enter or click to view image in full size From very human beginnings to definitions based on gravity, the…
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Ask Ethan: Can Weber bars detect gravitational waves? | by Ethan Siegel | Starts With A Bang! | Nov, 2025
When a gravitational wave passes through a location in space, it causes an expansion and a compression at alternate times…
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Astounding stream of stars caught escaping from nearby galaxy | by Ethan Siegel | Starts With A Bang! | Nov, 2025
Press enter or click to view image in full size This image, from the Vera Rubin Observatory’s “First Look” release,…
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Ask Ethan: Could evolving dark energy lead to a Big Crunch? | by Ethan Siegel | Starts With A Bang! | Nov, 2025
Press enter or click to view image in full size The far distant fates of the Universe offer a number…
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Why aliens might not “speak physics” the same way we do | by Ethan Siegel | Starts With A Bang! | Nov, 2025
Press enter or click to view image in full size Touted as UFO lights, this 2011 photograph over Liverpool does,…
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