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Astronomy Picture Of the Day (APOD)
Ghost Aurora over Canada
31.10.2016
What does this aurora look like to you? While braving the cold to watch the skies above northern Canada early one morning in 2013, a most unusual aurora appeared. The aurora definitely appeared to be shaped like something , but what?
Halloween and the Ghost Head Nebula
30.10.2016
Halloween's origin is ancient and astronomical. Since the fifth century BC, Halloween has been celebrated as a cross-quarter day, a day halfway between an equinox (equal day / equal night) and a solstice (minimum day / maximum night in the northern hemisphere).
Moonset at Whitby Abbey
29.10.2016
October's Hunters Moon shines near the horizon, setting beyond the arches of Whitby Abbey in this eerie night scene. The moonlight partly illuminates the ruined Benedictine abbey's grounds and walls on a cliff overlooking the North Sea from England's Yorkshire coast.
Haunting the Cepheus Flare
28.10.2016
Spooky shapes seem to haunt this jeweled expanse, drifting through the night in the royal constellation Cepheus. Of course, the shapes are cosmic dust clouds faintly visible in dimly reflected starlight. Far from your...
A Giant Squid in the Flying Bat
27.10.2016
Very faint but also very large on planet Earth's sky, a giant Squid Nebula cataloged as Ou4, and Sh2-129 also known as the Flying Bat Nebula, are both caught in this cosmic scene toward the royal constellation Cepheus.
Propeller Shadows on Saturns Rings
26.10.2016
What created these unusually long shadows on Saturn's rings? The dark shadows -- visible near the middle of the image -- extend opposite the Sun and, given their length, stem from objects having heights up to a few kilometers.
Clouds Near Jupiters South Pole from Juno
25.10.2016
What's happening near the south pole of Jupiter? Recent images sent back by NASA's robotic Juno spacecraft are showing an interesting conglomeration of swirling clouds and what appear to be white ovals.
HI4PI: The Hydrogen Sky
24.10.2016
Where are the Milky Way's gas clouds and where are they going? To help answer this question, a new highest-resolution map of the sky in the universe's most abundant gas -- hydrogen -- has been completed and recently released, along with its underlying data.
Eagle Aurora over Norway
23.10.2016
What's that in the sky? An aurora. A large coronal mass ejection occurred on our Sun five days before this 2012 image was taken, throwing a cloud of fast moving electrons, protons, and ions toward the Earth.
Cerro Tololo Trails
22.10.2016
Early one moonlit evening car lights left a wandering trail along the road to the Chilean Cerro Tololo Inter-American Observatory. Setting stars left the wandering trails in the sky. The serene view toward the mountainous horizon was captured in a telephoto timelapse image and video taken from nearby Cerro Pachon, home to Gemini South.
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