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Posts by Deborah Byrd

Science Wire | Apr 28, 2016

Did Earth’s magnetic field collapse for 2 hours on April 23?

No, Earth’s magnetic field did not collapse for 2 hours on April 23. The erroneous story, which is still spreading, originated with a glitch in a computer simulation.

Omega Centauri on March 14, 2016 by Rob Pettengill in Terlingua, Texas.
Today's Image | Apr 27, 2016

Omega Centauri, a ghost galaxy, from a ghost town

Under dark night skies near Big Bend National Park in South Texas, our galaxy’s largest globular star cluster.

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Blogs | FAQs | Photos | Apr 27, 2016

What makes a red rainbow?

Red rainbows happen when the sun is on the horizon. They’re created in much the same process that causes a sunset or sunrise to look red.

Discovery image for first-ever known moon orbiting the remote dwarf planet Makemake.
Science Wire | Apr 26, 2016

Dwarf planet Makemake has a moon

This Hubble Space Telescope image reveals the first moon ever discovered around little Makemake, in the outermost region of our solar system.

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Science Wire | Apr 26, 2016

Watch NASA build James Webb Space Telescope

The JWST mirror covers off for a few days this week, and webcams are set up at Goddard Space Flight Center. Watch!

Venus Express aerobraking. Image credit: ESA - C. Carreau
Science Wire | Apr 26, 2016

What Venus Express learned by aerobraking

Results from the Venus Express spacecraft, obtained when – in the craft’s final months – it surfed the dense atmosphere of Venus.

Moonrise on April 23, 2016 by Scott Kuhn.
Today's Image | Apr 26, 2016

Holding 2016’s smallest full moon

The farthest full moon, and smallest full moon, on April 22-23, 2016.

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Tonight | Apr 26, 2016

How do you star hop?

Find new stars and constellations by star hopping from ones you already know.

Artist's concept of Spica from hypothetical planet
Science Wire | Apr 23, 2016

Spica is a whirling double star

Spica is a binary star, with two stars larger and hotter than the sun, telescopically indistinguishable from a single point of light.

Photo by Justin Ng
Tonight | Apr 23, 2016

EarthSky’s meteor shower guide for 2016

A list of major meteor showers in 2016. Next one up: the Eta Aquarids. Peak mornings May 5 and 6, but it’s a broad peak … watch several mornings around peak dates.