All Explorations

If the universe is infinitely large and filled with countless stars, why is night black?

A surprisingly complicated answer to a very simple question.

Stars look like tiny peaceful points of light. They are anything but simple.

The first thing I thought I understood, until I learned about spacetime.

We can't see all of the universe, only the part where light has had time to reach us.

Einstein called it spooky. It turns out it's real, and stranger than he imagined.

Nobody knows for certain. But physics gives us some terrifying guesses.

We can't see it, we can't touch it, but without it, galaxies would fly apart.

A sugar cube of neutron star material would weigh as much as Mount Everest.