SCIENCE
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5 ways our naked-eye views of the night sky deceive us | by Ethan Siegel | Starts With A Bang! | Jul, 2025
Under ideal dark sky conditions, the unaided human eye can see up to 6000 stars at once, and up to…
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Ask Ethan: What puzzles can the Vera Rubin Observatory help solve? | by Ethan Siegel | Starts With A Bang! | Jul, 2025
This image, taken in April of 2025, shows the completed and operational Vera C. Rubin Observatory with its dome open…
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Ask Ethan: Is the Hubble tension a real problem? | by Ethan Siegel | Starts With A Bang! | Jun, 2025
The construction of a cosmic distance ladder begins with measuring the parallax of individual stars within the Milky Way and…
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Is the Hubble tension real? Exclusive interview with Wendy Freedman | by Ethan Siegel | Starts With A Bang! | Jun, 2025
If you measure the expansion rate of the Universe using an early relic method, like the light from the CMB…
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Ask Ethan: Does cosmic inflation violate energy conservation? | by Ethan Siegel | Starts With A Bang! | Jun, 2025
When the Universe undergoes a period of cosmic inflation, the fabric of space — which has a tremendously high energy…
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How to understand the Universe’s the most important equation | by Ethan Siegel | Starts With A Bang! | Jun, 2025
Our Universe, as far back as we can trace it, has been expanding at a rate that is dependent on…
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JWST reveals that galaxies grow up quickly in our Universe | by Ethan Siegel | Starts With A Bang! | Jun, 2025
The largest galaxies displayed here aren’t blurry because they’re overexposed or because of atmospheric interference, but rather because JWST is…
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Ask Ethan: What are the “first stars” in the Universe? | by Ethan Siegel | Starts With A Bang! | Jun, 2025
An illustration of the first stars turning on in the Universe. Without metals to cool down the clumps of gas…
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How the Milky Way-Andromeda merger became so uncertain | by Ethan Siegel | Starts With A Bang! | Jun, 2025
Back prior to 1923, no one knew whether Andromeda was a galaxy beyond the Milky Way or an object present…
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Ask Ethan: What would the Universe be like without dark matter? | by Ethan Siegel | Starts With A Bang! | Jun, 2025
A 3D map of the dark matter distribution in the cosmos. By measuring the average shape of galaxies throughout the…
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