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When a star like our sun dies, it casts off its outer layers of gas, leaving only the hot core behind. A burned-out star, called a white dwarf, is the white dot in the center of this image taken by the Hubble Space Telescope.

Dead planets can ‘broadcast’ for up to a billion years, and they could tell astronomers what will happen after our sun blows up

Finding dead planets' radio broadcasts can help scientists learn how the sun's death in 5 billion years will affect our solar system.
Even if your foundation has SPF, you're likely not using enough of the stuff to get adequate sun protection.

Makeup with SPF can protect you from the sun, but not as well as you think

Even if your foundation contains a high SPF, you're likely not wearing enough of it to actually keep your skin safe from sun damage.
A Manhattanhenge sunset on 42nd Street July 11, 2014.

A stunning ‘Manhattanhenge’ sunset is happening on Friday and Saturday in New York City. Here’s how to see it.

The sun will dip perfectly between buildings in Manhattan to create a spectacle of light on Friday, July 12, and Saturday, July 13, 2019.
Friends watch the eclipse on August 21, 2017 in Menan, Idaho.

A total solar eclipse will be visible on July 2 for the first time since 2017 — here’s how you can watch it anywhere in the world

On July 2, parts of Chile, Argentina, and the south Pacific Ocean will experience a total solar eclipse — the first such celestial event since 2017.
A total solar eclipse is photographed from atop Carroll Rim Trail at Painted Hills, a unit of the John Day Fossil Beds National Monument, near Mitchell, Oregon, U.S. August 21, 2017

Watch NASA’s livestream of the total solar eclipse in South America

NASA partnered with the Exploratorium to offer a chance for the rest of the world to see the total solar eclipse via livestream on July 2, 2019.

An animated map shows every total solar eclipse around the world until 2040

Solar eclipses happen across the globe at least once a year. Not all of them appear over populated areas, but some may happen close to you.
A man jumps off of Stonehenge during summer solstice celebrations.

The June solstice comes on Friday. Here’s why the event kicks off summer and winter at the same time.

In the northern hemisphere, June 21 will be the longest day of the 2019. But in the southern hemisphere, it will be the shortest.
A view of Africa taken by Apollo 11 astronauts on July 20, 1969.

The first day of spring is finally here — for about 90% of us. Here’s why equinoxes mark the changing of seasons.

The spring or vernal equinox happens at 5:58 p.m. ET on Wednesday, March 20, 2019. Here's how Earth and the sun work together to change our seasons.
Testing has shown a connection between vitamin D and depression.

Everything you need to know about Vitamin D and how it’s linked to your mood

Vitamin D can be very important for your overall health, but especially for your mood. We asked two experts how big that link is.
An illustration of Earth during the December solstice in 2018.

The December solstice is here. Here’s how it works and why it starts winter and summer at the same time.

The winter solstice happens Friday — if you live in Earth's Northern Hemisphere. For the Southern Hemisphere, it's the start of summer.