Head

 

Astronomy Picture of the Day: Orion in Red and Blue

When did Orion become so flashy? This colorful rendition of part of the constellation of Orion comes from red light emitted by hydrogen and sulfur (SII), and blue-green light emitted by oxygen (OIII).

Astronomy Picture of the Day: The Falcon 9 Nebula

Not the Hubble Space Telescope's latest view of a distant planetary nebula, this illuminated cloud of gas and dust dazzled even casual U.S. west coast skygazers on October 7.

Astronomy Picture of the Day: Comet 21P Between Rosette and Cone Nebulas

Small bits of this greenish-gray comet are expected to streak across Earth's atmosphere tonight.

Astronomy Picture of the Day: The Last Days of Venus as the Evening Star

That's not a young crescent Moon poised above the hills along the western horizon at sunset.

Astronomy Picture of the Day: Sea and Sky Glows over the Oregon Coast

Every step caused the sand to light up blue. That glow was bioluminescence -- a blue radiance that also lights the surf in this surreal scene captured last month at Meyer's Creek Beach in Oregon, USA.

Astronomy Picture of the Day: Active Prominences on a Quiet Sun

Why is the Sun so quiet? As the Sun enters into a period of time known as a Solar Minimum, it is, as expected, showing fewer sunspots and active regions than usual.

Astronomy Picture of the Day: From the Galactic Plane through Antares

Behold one of the most photogenic regions of the night sky, captured impressively.

Astronomy Picture of the Day: The Case of the Backwards Orbiting Asteroid

Why does asteroid 2015 BZ509 orbit the Sun the backwards?

Astronomy Picture of the Day: The Blue Horsehead Nebula in Infrared

The Blue Horsehead Nebula looks quite different in infrared light.

Astronomy Picture of the Day: Meteor Over Crater Lake

Did you see it? One of the more common questions during a meteor shower occurs because the time it takes for a meteor to flash is typically less than the time it takes for a head to turn.

Top