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How to catch the Perseids and defeat the almost-full Moon

How to catch the Perseids and defeat the almost-full Moon

If you know when, where and how to look, the show will still be spectacular.
Go to the profile of Ethan Siegel
Ethan Siegel
Maryam Mirzakhani, A Candle Illuminating The Dark

Maryam Mirzakhani, A Candle Illuminating The Dark

One of the most brilliant mathematical minds of this century lost her life to cancer at only 40. Here’s what she illuminated.
Go to the profile of Paul Halpern
Paul Halpern
Universe’s Largest Black Hole May Have An Explanation At Last

Universe’s Largest Black Hole May Have An Explanation At Last

Black holes shouldn’t be this big, much less this big so many billions of years ago. Yet here we are.
Go to the profile of Ethan Siegel
Ethan Siegel
Ask Ethan: Does light always move at the same speed?

Ask Ethan: Does light always move at the same speed?

The speed of light is a universal constant, but that doesn’t necessarily mean that light always travels at that speed, does it?
Go to the profile of Ethan Siegel
Ethan Siegel
If the Universe is expanding, then why aren’t we?

If the Universe is expanding, then why aren’t we?

The atoms, planets, stars, and even galaxies aren’t expanding, even though space is. How come?
Go to the profile of Ethan Siegel
Ethan Siegel
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