保护地球，探索宇宙，发现文明
2023年7月12日 Rings and Bar of Spiral Galaxy NGC 1398 Image Credit: Mark Hanson; Data: Mike Selby Explanation: Why do some spiral galaxies have a ring around the center? Spiral galaxy NGC 1398 not only has a ring of pearly stars, gas and dust around its center, but a bar of stars and gas across its center, and spiral arms that appear like ribbons farther out. T...
这段视频是作为CEERS（宇宙演化早期发布科学）调查的一部分拍摄的星系的科学可视化，展示了NASA詹姆斯·韦伯太空望远镜的一项重大任务。
A bobcat surveys the landscape at NASA’s Armstrong Flight Research Center in Edwards, California in this March 11, 2021, image. The spotted feline makes its home on the more than 300,000 acres of Mojave Desert surrounding the NASA facility housed at Edwards Air Force Base. Named in honor of Neil A. Armstrong, a former research test pilot at the center and th...
2023年7月11日 Sunspots on an Active Sun Image Credit: NASA, SDO; Processing & Copyright: Şenol Şanlı Explanation: Why is our Sun so active now? No one is sure. An increase in surface activity was expected because our Sun is approaching solar maximum in 2025. However, last month our Sun sprouted more sunspots than in any month during the entire previous 11-...
NASA’s New Horizons spacecraft captured this high-resolution enhanced color view of Charon, Pluto’s largest moon, just before closest approach on July 14, 2015. The image combines blue, red, and infrared images taken by the spacecraft’s Ralph/Multispectral Visual Imaging Camera (MVIC); the colors are processed to best highlight the variatio...
2023年7月10日 Stars, Dust and Nebula in NGC 6559 Image Credit & Copyright: Adam Block, Telescope Live Explanation: When stars form, pandemonium reigns. A textbook case is the star forming region NGC 6559. Visible in the featured image are red glowing emission nebulas of hydrogen, blue reflection nebulas of dust, dark absorption nebulas of dust, and the sta...
2023年7月9日 Doomed Star Eta Carinae Image Credit & Copyright: NASA, ESA, Hubble; Processing & License: Judy Schmidt Explanation: Eta Carinae may be about to explode. But no one knows when – it may be next year, it may be one million years from now. Eta Carinae‘s mass – about 100 times greater than our Sun – makes it an excelle...
2023年7月8日 Stickney Crater Image Credit: HiRISE, MRO, LPL (U. Arizona), NASA Explanation: Stickney Crater, the largest crater on the martian moon Phobos, is named for Chloe Angeline Stickney Hall, mathematician and wife of astronomer Asaph Hall. Asaph Hall discovered both the Red Planet’s moons in 1877. Over 9 kilometers across, Stickney is nearly half ...
NASA’s Psyche spacecraft is nearly complete as it rests in a clean room on June 26, 2023, at Astrotech Space Operations Facility near the agency’s Kennedy Space Center in Florida. Engineers and technicians have begun final assembly, test, and launch operations on Psyche, with assembly of the spacecraft all but complete except for the installation of th...
2023年7月7日 The Double Cluster in Perseus Image Credit & Copyright: Mårten Frosth Explanation: This pretty starfield spans about three full moons (1.5 degrees) across the heroic northern constellation of Perseus. It holds the famous pair of open star clusters, h and Chi Persei. Also cataloged as NGC 869 (top) and NGC 884, both clusters are about 7,000 lig...