Axios

Monday's rare total solar eclipse passed across the U.S., turning the lights off as totality moved from Mexico's Pacific coast into Canada.

Why it matters: Almost everyone in the U.S. was able to see some part of it, and millions of Americans traveled to get the best view.

Heads turned up as Monday's rare total solar eclipse passed across the skies over U.S.

The big picture: Almost everyone in the U.S. was able to view the celestial event to some extent.

Get your eclipse glasses ready and set a reminder: Monday offers a rare, brief chance to see a solar eclipse for most of the country.

Why it matters: You'll have to wait until 2044 to spot a total solar eclipse in the contiguous U.S. if you miss this celestial event, according to NASA.

If you missed today's eclipse, you'll have to wait at least 20 years for your next chance to see one in the U.S.

The big picture: The next total solar eclipse in the U.S. will come in 2044, but it will only graze a sliver of Montana and North Dakota.

If you can't find proper viewing glasses to view the total solar eclipse on Monday, you can make a pinhole viewing camera.

Why it matters: Glasses may be hard to find.

For most of the country, looking at Monday's rare solar eclipse — even a quick glance — can cause eye damage if you don't wear the right protective eyewear.

Why it matters: NASA warns "it is not safe to look directly at the Sun without specialized eye protection for solar viewing" except during the brief total phase of a total solar eclipse.

On Monday, most people in the U.S. should be able to see the Moon partially or totally block the Sun, weather permitting, according to NASA.

Why it matters: It will be the first total solar eclipse visible in the U.S. since 2017, and in many ways, it will overshadow that previous celestial event.

The total solar eclipse may only last a matter of minutes, but you can spend hours setting the mood for it.

The intrigue: We've created the ultimate compilation for the phenomenon to bring some sunshine to your ears amid the darkness.