2022年2月15日 Terminator Moon Image Credit: NASA, Lunar Reconnaissance Orbiter, SVS; Processing & Copyright: Jai & Neil Shet Explanation: What’s different about this Moon? It’s the terminators. In the featured image, you can’t directly see any terminator — the line tha […]
2022年2月14日 In the Heart of the Heart Nebula Image Credit & Copyright: Adam Jensen Explanation: What excites the Heart Nebula? First, the large emission nebula dubbed IC 1805 looks, in whole, like a human heart. Its shape perhaps fitting of the Valentine’s Day, this heart glows brightly in
2022年2月13日 Earth at Night Image Credit: NASA, Suomi NPP VIIRS; Data: Miguel Román (NASA GSFC); Processing: Joshua Stevens Explanation: This is what the Earth looks like at night. Can you find your favorite country or city? Surprisingly, city lights make this task quite possible. Human-made lights hi
2022年2月12日 Aurora by Moonlight Image Credit & Copyright: P-M Hedén (Clear Skies, TWAN) Explanation: The ice was singing as light from a bright gibbous Moon cast shadows across this frozen lake, about 20 kilometers north of Stockholm, Sweden, planet Earth. In the alluring night skyscape captured
2022年2月11日 IC 342: The Hidden Galaxy in Camelopardalis Image Credit & Copyright: Daniel Feller Explanation: Similar in size to large, bright spiral galaxies in our neighborhood, IC 342 is a mere 10 million light-years distant in the long-necked, northern constellation Camelopardalis. A sprawlin
2022年2月10日 T Tauri and Hind’s Variable Nebula Image Credit & Copyright: Dawn Lowry, Gian Lorenzo Ferretti, Ewa Pasiak and Terry Felty Explanation: The star with an orange tint near top center in this dusty telescopic frame is T Tauri, prototype of the class of T Tauri variable stars. Next
2022年2月9日 Eta Car: 3D Model of the Most Dangerous Star Known Video Credit: NASA, CXC, April Hobart; Text: Michael F. Corcoran (NASA, Catholic U., HEAPOW) Explanation: What’s the most dangerous star near earth? Many believe it’s Eta Carinae, a binary star system about 100 times the mass o
2022年2月8日 Aurora and Light Pillars over Norway Image Credit & Copyright: Alexandre Correia Explanation: Which half of this sky is your favorite? On the left, the night sky is lit up by particles expelled from the Sun that later collided with Earth’s upper atmosphere — creating bright auro
2022年2月7日 NGC 4651: The Umbrella Galaxy Image Credit & Copyright: CFHT, Coelum, MegaCam, J.-C. Cuillandre (CFHT) & G. A. Anselmi (Coelum) Explanation: It’s raining stars. What appears to be a giant cosmic umbrella is now known to be a tidal stream of stars stripped from a small satel
2022年2月6日 Blue Marble Earth Image Credit: NASA, Apollo 17 Crew Explanation: Welcome to planet Earth, the third planet from a star named the Sun. The Earth is shaped like a sphere and composed mostly of rock. Over 70 percent of the Earth’s surface is water. The planet has a relatively thin atmo
