It’s #International Astronomy Day and Hubble has turned 27 this month! Let’s celebrate with some of its most breathtaking pictures!
In this vlog, I talk about Prof. Payne-Gaposchkin, one the most important astronomers of the 20th Century. Thanks to her we know that stars are not made by the same elements as the Earth, and that Hydrogen is the most abundant element in the Universe.
I was asked by Larry, one of my students, about what would be the best place in the solar system to destroy the One Ring. Since the 25th of March is the anniversary of its destruction and the fall of Sauron I thought I’d dedicate this vlog to answering the question as seriously and as accurately as possible.
One of the fundamental laws of the universe is the conservation of Energy. Nothing is created, nothing is destroyed, and all is transformed. And so the death of the original stars brought forth new stars which then died again, adding heavier elements than hydrogen to the composition of the universe.
The cosmic microwave background or CMB is my second feature for this series. The CMB is formed by the original photons produced in the Big Bang and was created at the last scattering surface.
Pluto is still not officially a planet. No matter what most people think, both scientist and non, until the International Astronomical Union has a vote, Pluto remains a dwarf planet.
In this “out of office” vlog I try to clarify some misconceptions about the distance between the Earth and the Moon, using props and a wonderful animation by Digital Welshman.