2023年7月30日 Spiral Aurora over Icelandic Divide Image Credit & Copyright: Juan Carlos Casado (Starry Earth, TWAN) Explanation: Admire the beauty but fear the beast. The beauty is the aurora overhead, here taking the form of a great green spiral, seen between picturesque clouds with the bright Mo […]
2023年7月29日 Apollo 11: Catching Some Sun Image Credit: Apollo 11, NASA (Image scanned by Kipp Teague) Explanation: Bright sunlight glints as long dark shadows mark this image of the surface of the Moon. It was taken fifty-four years ago, July 20, 1969, by Apollo 11 astronaut Neil Armstrong, the first
2023年7月28日 Young Stars, Stellar Jets Image Credit: NASA, ESA, CSA, Processing: Joseph DePasquale (STScI) Explanation: High-speed outflows of molecular gas from a pair of actively forming young stars shine in infrared light, revealing themselves in this NIRcam image from the James Webb Space Telescop
2023年7月27日 Galaxies in the River Image Credit & License: CTIO/NOIRLab/DOE/NSF/AURA; R. Colombari, M. Zamani & D. de Martin (NSF’s NOIRLab) Explanation: Large galaxies grow by eating small ones. Even our own galaxy engages in a sort of galactic cannibalism, absorbing small galaxies that are
2023年7月26日 IC 4628: The Prawn Nebula Image Credit & Copyright: Daniel Stern Explanation: South of Antares, in the tail of the nebula-rich constellation Scorpius, lies emission nebula IC 4628. Nearby hot, massive stars, millions of years young, irradiate the nebula with invisible ultraviolet lig
2023年7月25日 The Eagle Nebula with X-ray Hot Stars Image Credit: X-ray: Chandra: NASA/CXC/SAO, XMM: ESA/XMM-Newton; IR: JWST: NASA/ESA/CSA/STScI, Spitzer: NASA/JPL/CalTech; Visible: Hubble: NASA/ESA/STScI, ESO; Image Processing: L. Frattare, J. Major, N. Wolk, and K. Arcand Explanation: What do the fa
2023年7月24日 Chemicals Glow as a Meteor Disintegrates Image Credit & Copyright: Michael Kleinburger Explanation: Meteors can be colorful. While the human eye usually cannot discern many colors, cameras often can. Pictured here is a fireball, a disintegrating meteor that was not only one of the br
2023年7月23日 The Antikythera Mechanism Image Credit & License: Marsyas, Wikipedia Explanation: It does what? No one knew that 2,000 years ago, the technology existed to build such a device. The Antikythera mechanism, pictured, is now widely regarded as the first computer. Found at the bottom of t
2023年7月22日 Apollo 11: Armstrong’s Lunar Selfie Image Credit: NASA, Apollo 11, Neil Armstrong; Processing: Michael Ranger Explanation: A photograph of Buzz Aldrin standing on the Moon taken by Neil Armstrong, was digitally reversed to create this lunar selfie. Captured in July 1969 following th
2023年7月21日 Galactic Cirrus: Mandel Wilson 9 Image Credit & Copyright: Gabriel Rodrigues Santos Explanation: The combined light of stars along the Milky Way are reflected by these cosmic dust clouds that soar 300 light-years or so above the plane of our galaxy. Known to some as integrated flux n
