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EarthSky Voices

What is a globular cluster?

A globular cluster is a spherical collections of stars, orbiting in the halo of spiral galaxies. Our Milky Way galaxy has over 150 globular clusters.

Betelgeuse is recovering from blowing its top

Betelgeuse blew its top in 2019. The explosion kicked up a dust cloud, which made the star look dimmer from Earth. The star is slowly recovering.

Meteors in moonlight: 6 tips for 2022’s Perseids

Meteors in moonlight. It's not optimal, but it happens! Here's how to minimize the moon and optimize the Perseid meteor shower in 2022.

How do meteorites survive their fiery journey to the ground?

Asteroid 2008 TC3 entered our atmosphere and scattered meteorites over Sudan. Researchers found the resulting meteorites came from the back of the asteroid.

NASA troubleshoots Lucy: A real space drama

NASA troubleshoots Lucy following launch, after discovering a solar array didn't deploy successfully. Lucy's teams worked together to come up with a solution.

Earth’s shortest day sets new record

Earth has been speeding up over the past few years, resulting in our shortest day ever as measured by atomic clocks. Will we need to subtract a leap second?

Learn to shoot photos of meteors

Want to try to capture a meteor with your camera? The first step is planning. The next step is to gather your equipment. Then on to the capture process itself.

Webb could see biosignatures on distant planets

Astronomers hope to use the James Webb Space Telescope to detect biosignatures - signs of life - in the atmospheres of distant planets.

Heatwaves and fires in Europe, Africa, and Asia

NASA Earth Observatory reports on heatwaves and fires in Europe, Africa and Asia in summer 2022 and attributes the extreme weather to global warming.

What is the electromagnetic spectrum?

The light our eyes can detect is only a sliver of the light out there. The electromagnetic spectrum describes all the wavelengths of light, seen and unseen.