Ep. 768: Comets' Unpredictability

Astronomy Cast Ep. 778: Dyson Swarms By Fraser Cain & Dr. Pamela Gay Streamed live on Jan 5, 2026. Freeman Dyson asked a fascinating question. What would it look like if a civilization was using all the energy coming from their star? And what form would this take? This introduced ...  Show more

Astronomy Cast Ep. 777: The Eddington Limit By Fraser Cain & Dr. Pamela Gay Streamed live on Dec 29, 2025. How big can a star get? This is a calculation made by one of the original pioneers of modern astronomy, Sir Arthur Eddington. And it's named after him, the Eddington Limit. ...  Show more

Dr. Al Grauer hosts. Dr. Albert D. Grauer ( @Nmcanopus ) is an observational asteroid hunting astronomer. Dr. Grauer retired from the University of Arkansas at Little Rock in 2006. travelers ...

Why did Oumuamua, the first discovered interstellar object, accelerate faster than it should? Neil deGrasse Tyson and Chuck Nice explore the mysteries of the newest objects in the solar system: “dark comets” and interstellar objects with astrophysicist Darryl Seligman. 

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The European Space Agency recently announced that the near-Earth asteroid 2024 YR4 has a 2 percent chance of hitting our planet in 2032. The probability of impact is difficult to predict exactly and will be clearer in 2028, when 2024 YR4 will whiz by us. But if the asteroid reall ...  Show more

The black hole at the center of our galaxy is emitting near-constant, random light. The European Space Agency has approved astronaut candidate John McFall, making McFall the first physically disabled candidate to be cleared to fly. The risk of asteroid 2024 YR4 hitting Earth rose ...  Show more