Pluto? Not a Planet

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  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...

The Seven Wonders of the Milky Way

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http://www.youtube.com/watch?v=H2jPHp1FkcQ The Seven Wonders of the Milky Way are: The Sagittarius stream, a long, complex, structure made of stars that wrap in polar orbit around the Galaxy. It consists of tidally stripped stars from...

Meet The Overly Powerful Black Hole RX J1532

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https://youtu.be/_eZFWOdOXu0 I've been asked a few times about powerful supermassive black holes, and one of my old articles has suddenly become popular again, getting a thousand views in June, so...

Cecilia Payne-Gaposchkin: the woman who discovered what the Universe is made of.

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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.

Destroying the One Ring in Space

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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.

The Universe in 10 Features – 1. Cosmic Inflation

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http://www.youtube.com/watch?v=Vn4buJ2SJjc The Universe began 13.8 billion years ago in an event called the Big Bang. Throughout its ages the universe has changed a lot, sometimes dramatically, so to appreciate these...

International Astronomy Day 2017 & Hubble at 27!

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It's #International Astronomy Day and Hubble has turned 27 this month! Let's celebrate with some of its most breathtaking pictures! https://youtu.be/0mI2HAYvJ-w