Ethan SiegelinStarts With A Bang!Ask Ethan: Is the Universe finite or infinite?The Universe’s history, from cosmic inflation to the Big Bang to the present, is known. But whether it’s infinite or not is still a…17h ago17h ago
Ethan SiegelinStarts With A Bang!After 13.8 billion years, why hasn’t the Big Bang faded away?Although the Big Bang occurred at an instant in time long ago, we still see the light from it. Will the evidence ever disappear completely?1d ago41d ago4
Ethan SiegelinStarts With A Bang!The Milky Way’s stars are gradually being ejectedKnown as hypervelocity stars, we originally thought just one would be ejected every 100,000 years. The real number is much greater.2d ago62d ago6
Ethan SiegelinStarts With A Bang!Astronomers near a complete picture for how planets formNewborn stars are surrounded only by a featureless disk. Debris disks persist for hundreds of millions of years. So when do planets form?3d ago33d ago3
Ethan SiegelinStarts With A Bang!RIP Apollo 8 astronaut Bill Anders, who rediscovered EarthIn December of 1968, human beings made their first-ever journey to the Moon aboard Apollo 8. Their most important discovery? Planet Earth.4d ago34d ago3
Ethan SiegelinStarts With A Bang!Starts With A Bang podcast #106 — the troublesome hunt for Planet NineOut beyond Neptune are some fascinating bodies left over from our Solar System’s formation. Could one of them truly be spectacular?6d ago6d ago
Ethan SiegelinStarts With A Bang!Ask Ethan: Why do matter and antimatter annihilate?From forming bound states to normal scattering, many possibilities abound for matter-antimatter interactions. So why do they annihilate?Jun 147Jun 147
Ethan SiegelinStarts With A Bang!No, gain of function research did not cause COVID-19SARS-CoV-2 first emerged in humans in 2019. Despite much noise generated by lab leak proponents, the evidence indicates a natural origin.Jun 1321Jun 1321
Ethan SiegelinStarts With A Bang!2024’s summer solstice is Earth’s earliest since 1796On June 20, 2024, the summer solstice occurs at its earliest moment since 1796: when George Washington was President of the USA. Here’s…Jun 126Jun 126
Ethan SiegelinStarts With A Bang!No, new measurements can’t relax the Hubble tensionThere are two different ways to measure the expansion rate of the Universe, and they don’t agree. And no, new measurements don’t help.Jun 115Jun 115