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Astronomers discover how energy escapes the galactic center
Astronomers discover how energy escapes the galactic center
The galactic center is home to the most powerful engine in the Milky Way: a supermassive black hole. How does its energy ultimately escape?
Ethan Siegel
May 20
Starts With A Bang Podcast #105 — Dark Matter and Galaxies
Starts With A Bang Podcast #105 — Dark Matter and Galaxies
We normally think of dark matter as the “glue” that holds galaxies and larger structures together. But it’s so much more than that.
Ethan Siegel
May 18
Ask Ethan: Can you explain wide binaries and modified gravity?
Ask Ethan: Can you explain wide binaries and modified gravity?
There are many theories of gravity out there, and many interpretations of wide binary star data. What have we really learned from it all?
Ethan Siegel
May 17
Does the Universe expand by stretching or creating space?
Does the Universe expand by stretching or creating space?
The evidence that the Universe is expanding is overwhelming. But how? By stretching the existing space, or by creating new space itself?
Ethan Siegel
May 16
Our best idea for the “origin of gold” doesn’t add up
Our best idea for the “origin of gold” doesn’t add up
In 2017, we detected gold being forged in a neutron star-neutron star merger. Now, in 2024, the amounts created simply don’t add up.
Ethan Siegel
May 15
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