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Why JWST doesn’t have the same limits as Hubble
Why JWST doesn’t have the same limits as Hubble
All telescopes are fundamentally limited in what they can see. JWST reveals more distant galaxies than Hubble, but still can’t see them…
Ethan Siegel
Jul 2
The Universe’s “dark ages” were briefer than we imagined
The Universe’s “dark ages” were briefer than we imagined
There was a time where no starlight was visible throughout the entire cosmos. That time was short-lived: shorter than astronomers imagined.
Ethan Siegel
Jul 1
Ask Ethan: Could gravitational waves collapse into a black hole?
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 black…
Ethan Siegel
Jun 28
How traveling back in time is permitted by Einstein’s physics
How traveling back in time is permitted by Einstein’s physics
Traveling back in time is a staple of science fiction movies. But according to Einstein, it’s a physical possibility that’s truly allowed.
Ethan Siegel
Jun 27
Astronomy’s secret weapon in the resolution wars: interferometry
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 times…
Ethan Siegel
Jun 26
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