2022年8月24日 The Cartwheel Galaxy from Webb Image Credit: NASA, ESA, CSA, STScI, Webb ERO Production Team Explanation: To some, it looks like a wheel of a cart. In fact, because of its outward appearance, the presence of a central galaxy, and its connection with what looks like the spokes of a wheel, […]
2022年8月23日 Meteor & Milky Way over the Mediterranean Image Credit & Copyright: Julien Looten Explanation: Careful planning made this a nightscape to remember. First, the night itself was chosen to occur during the beginning of this year’s Perseid Meteor Shower. Next, the time of nigh
2022年8月22日 Earth’s Recent Climate Spiral Video Credit: NASA’s Scientific Visualization Studio Explanation: Is our Earth warming? Compared to the past 250 million years, the Earth is currently enduring a relative cold spell, possibly about four degrees Celsius below average. Over the past
2022年8月21日 The Spinning Pulsar of the Crab Nebula Image Credit: NASA: X-ray: Chandra (CXC), Optical: Hubble (STScI), Infrared: Spitzer (JPL-Caltech) Explanation: At the core of the Crab Nebula lies a city-sized, magnetized neutron star spinning 30 times a second. Known as the Crab Pulsar, it is the
2022年8月20日 Stardust and Comet Tails Image Credit & Copyright: Rolando Ligustri (CARA Project, CAST) Explanation: Heading for its closest approach to the Sun, or perihelion, on December 19 comet C/2017 K2 (PanSTARRS) remains a sight for telescopic observers as it sweeps through planet Earth̵
2022年8月19日 Saturn: 1993 – 2022 Image Credit & Copyright: Tunc Tezel (TWAN) Explanation: Saturn is the most distant planet of the Solar System easily visible to the unaided eye. With this extraordinary, long-term astro-imaging project begun in 1993, you can follow the ringed gas giant for
2022年8月18日 Full Moon Perseids Image Credit & Copyright: Juan Carlos Casado (Starry Earth, TWAN) Explanation: The annual Perseid meteor shower was near its peak on August 13. As planet Earth crossed through streams of debris left by periodic Comet Swift-Tuttle meteors rained in northern summer n
2022年8月17日 Stargate Milky Way Image Credit & Copyright: Maxime Oudoux Explanation: There is a huge gate of stars in the sky, and you pass through it twice a day. The stargate is actually our Milky Way Galaxy, and it is the spin of the Earth that appears to propel you through it. More typically,
2022年8月16日 A Meteor Wind over Tunisia Image Credit & Copyright: Makrem Larnaout Explanation: Does the Earth ever pass through a wind of meteors? Yes, and they are frequently visible as meteor showers. Almost all meteors are sand-sized debris that escaped from a Sun-orbiting comet or asteroid, d
2022年8月15日 The Cygnus Wall of Star Formation Image Credit & Copyright: Johan Bogaerts Explanation: The North America nebula on the sky can do what the North America continent on Earth cannot — form stars. Specifically, in analogy to the Earth-confined continent, the bright part that appea
