Ethan SiegelinStarts With A Bang!The epic race inside the Pillars of Creation is almost overThe last infant stars are finishing their formation inside these pillars of gas. The evaporation of those columns is almost complete.13h ago13h ago
Ethan SiegelinStarts With A Bang!Ask Ethan: Why is it darker during Winter than Summer?Sure, there’s less daylight during Winter than Summer, as your hemisphere is tilted away from the Sun. But darkness goes deeper than that.3d ago33d ago3
Ethan SiegelinStarts With A Bang!The only two “arrows of time” we have don’t matchOur thermodynamic arrow of time explains why the entropy of any isolated system always increases. But it can’t explain what we perceive.4d ago94d ago9
Ethan SiegelinStarts With A Bang!The mystery of the Moon’s two faces could soon be solvedThe near and far sides of the Moon are so different from each other, and no one is sure why. New lunar samples could confirm a wild theory.5d ago75d ago7
Ethan SiegelinStarts With A Bang!Why JWST doesn’t have the same limits as HubbleAll telescopes are fundamentally limited in what they can see. JWST reveals more distant galaxies than Hubble, but still can’t see them…6d ago6d ago
Ethan SiegelinStarts With A Bang!The Universe’s “dark ages” were briefer than we imaginedThere was a time where no starlight was visible throughout the entire cosmos. That time was short-lived: shorter than astronomers imagined.Jul 12Jul 12
Ethan SiegelinStarts With A Bang!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…Jun 284Jun 284
Ethan SiegelinStarts With A Bang!How traveling back in time is permitted by Einstein’s physicsTraveling back in time is a staple of science fiction movies. But according to Einstein, it’s a physical possibility that’s truly allowed.Jun 2715Jun 2715
Ethan SiegelinStarts With A Bang!Astronomy’s secret weapon in the resolution wars: interferometryThe sharpest optical images, for now, come from the Hubble Space Telescope. A ground-based technique can make images over 100 times…Jun 261Jun 261
Ethan SiegelinStarts With A Bang!The one reason that physicists won’t give up on supersymmetryAlmost 100 years ago, an asymmetric pathology led Dirac to postulate the positron. A similar pathology could lead us to supersymmetry.Jun 2511Jun 2511