分类: 天文·每日一图

瀑布与银河

2021年11月01日 A Waterfall and the Milky Way Image Credit & Copyright: Xie Jie Explanation: The dream was to capture both the waterfall and the Milky Way together. Difficulties included finding a good camera location, artificially illuminating the waterfall and the surrounding valley effectively, capturing the entire scene with numerous foreground and back...

模拟宇宙里的暗物质

2021年10月31日 Dark Matter in a Simulated Universe Illustration Credit & Copyright: Tom Abel & Ralf Kaehler (KIPAC, SLAC), AMNH Explanation: Is our universe haunted? It might look that way on this dark matter map. The gravity of unseen dark matter is the leading explanation for why galaxies rotate so fast, why galaxies orbit clusters so fast, why grav...

罗夏克墨渍极光

2021年10月30日 A Rorschach Aurora Image Credit & Copyright: Göran Strand Explanation: If you see this as a monster’s face, don’t panic. It’s only pareidolia, often experienced as the tendency to see faces in patterns of light and shadow. In fact, the startling visual scene is actually a 180 degree panorama of Northern Lights, digitally mi...

仙王火焰分子云的幽灵

2021年10月29日 Haunting the Cepheus Flare Image Credit & Copyright: Leo Shatz Explanation: Spooky shapes seem to haunt this dusty expanse, drifting through the night in the royal constellation Cepheus. Of course, the shapes are cosmic dust clouds visible in dimly reflected starlight. Far from your own neighborhood, they lurk above the plane of the Milky Wa...

奎宿九之魂

2021年10月28日 Mirach’s Ghost Image Credit & Copyright: John Chumack Explanation: As far as ghosts go, Mirach’s Ghost isn’t really that scary. Mirach’s Ghost is just a faint, fuzzy galaxy, well known to astronomers, that happens to be seen nearly along the line-of-sight to Mirach, a bright star. Centered in this star field, Mirach i...

NGC 6995:蝙蝠星云

2021年10月27日 NGC 6995: The Bat Nebula Image Credit & Copyright: Howard Trottier Explanation: Do you see the bat? It haunts this cosmic close-up of the eastern Veil Nebula. The Veil Nebula itself is a large supernova remnant, the expanding debris cloud from the death explosion of a massive star. While the Veil is roughly circular in shape and covers nearl...

木星自转

2021年10月26日 Jupiter Rotates Video Credit & Copyright: JL Dauvergne; Music: Oro Aqua (Benoit Reeves) Explanation: Observe the graceful twirl of our Solar System’s largest planet. Many interesting features of Jupiter’s enigmatic atmosphere, including dark belts and light zones, can be followed in detail. A careful inspection will reveal that d...

通往银河中心的路

2021年10月25日 Road to the Galactic Center Image Credit & Copyright: Michael Abramyan Explanation: Does the road to our galaxy’s center go through Monument Valley? It doesn’t have to, but if your road does — take a picture. In this case, the road is US Route 163 and iconic buttes on the Navajo National Reservation populate the horizon. Th...

万圣节与鬼头星云

2021年10月24日 Halloween and the Ghost Head Nebula Image Credit: Mohammad Heydari-Malayeri (Observatoire de Paris) et al., ESA, NASA Explanation: 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 (minimu...

贝努的3D影像

2021年10月23日 3D Bennu Image Credit: NASA, GSFC, U. Arizona – Stereo Image Copyright: Patrick Vantuyne Explanation: Put on your red/blue glasses and float next to asteroid 101955 Bennu. Shaped like a spinning toy top with boulders littering its rough surface, the tiny Solar System world is about one Empire State Building (less than 500 meters) across. Fr...