Ethan SiegelinStarts With A Bang!Arguments against dark matter in the Bullet Cluster fall apartThe Bullet Cluster has, for nearly 20 years, been hailed as an empirical “proof” of dark matter. Can their detractors explain it away?9h ago9h ago
Ethan SiegelinStarts With A Bang!Why humanity is a cosmic tale of despair and hopeOn a cosmic scale, our existence seems insignificant and inconsequential. But from another perspective, humans are completely remarkable.1d ago21d ago2
Ethan SiegelinStarts With A Bang!Ask Ethan: Is it all-or-nothing for the expanding Universe?On the largest of cosmic scales, the Universe is expanding. But it isn’t all-or-nothing everywhere, as “collapse” is also part of the…4d ago54d ago5
Ethan SiegelinStarts With A Bang!Starts With A Bang podcast #107 — Binary stars and modified gravityThe standard picture of our Universe is that it’s dominated by dark matter and dark energy. But this alternative is also worth considering.4d ago4d ago
Ethan SiegelinStarts With A Bang!The quantum physics behind fireworks displaysFrom the explosions themselves to their unique and vibrant colors, the fireworks displays we adore require quantum physics.5d ago25d ago2
Ethan SiegelinStarts With A Bang!How the Solar System led planet-hunters astrayThe structure of our Solar System has been known for centuries. When we finally started finding exoplanets, they surprised everyone.6d ago56d ago5
Ethan SiegelinStarts With A Bang!The scientist’s 10 commandmentsThere are many things that separate science from ideology, politics, philosophy, or religion. Follow these 10 commandments to get it right.Jul 924Jul 924
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.Jul 8Jul 8
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.Jul 53Jul 53
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.Jul 413Jul 413