Photo of the Day What's happening to this cloud? Ice crystals in a distant cirrus cloud are acting like little floating prisms. Known informally as a fire rainbow for its flame-like appearance, a circumhorizon arc appears parallel to the horizon. For a circumhorizontal arc to be visible, the Sun must be at least 58 [...]
APOD Science APOD APOD: 2026 August 2 – A Fire… Today’s APOD Archive Submissions Index Search Calendar RSS Education About Discuss APOD Astronomy Picture of the Day Discover the cosmos! Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. [...]
Photo of the Day The Buck Moon is a traditional name for the full moon of July. In this colorful Adriatic sea and skyscape captured on July 28 from Krk Island along the coast of Croatia, a full Buck Moon is just rising over distant mountains. Since a full moon rises as the Sun [...]
APOD Science APOD APOD: 2026 August 1 – Buck… Today’s APOD Archive Submissions Index Search Calendar RSS Education About Discuss APOD Astronomy Picture of the Day Discover the cosmos! Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. Buck [...]
Skywatching Skywatching Home What’s Up Meteor Showers Eclipses Daily Moon Guide More Tips & Guides Skywatching FAQ Night Sky Network A solar eclipse, the Perseids, bright Venus after sunset, and a deep partial lunar eclipse highlight August’s skywatching. Skywatching Highlights Aug. 5: Last Quarter Moon Aug. 12: Total solar eclipse across northern Russia, Greenland, [...]
These photos show how engineers with conducted testing on a 1.2% scale model of SpaceX’s Super Heavy Version 3 rocket booster at NASA’s Ames Research Center in California’s Silicon Valley. The tests focused on better understanding the extreme aerodynamic forces the rocket can experience during re-entry and builds on a previous test series completed at [...]
These photos show how engineers with conducted testing on a 1.2% scale model of SpaceX’s Super Heavy Version 3 rocket booster at NASA’s Ames Research Center in California’s Silicon Valley. The tests focused on better understanding the extreme aerodynamic forces the rocket can experience during re-entry and builds on a previous test series completed at [...]
These photos show how engineers with conducted testing on a 1.2% scale model of SpaceX’s Super Heavy Version 3 rocket booster at NASA’s Ames Research Center in California’s Silicon Valley. The tests focused on better understanding the extreme aerodynamic forces the rocket can experience during re-entry and builds on a previous test series completed at [...]
These photos show how engineers with conducted testing on a 1.2% scale model of SpaceX’s Super Heavy Version 3 rocket booster at NASA’s Ames Research Center in California’s Silicon Valley. The tests focused on better understanding the extreme aerodynamic forces the rocket can experience during re-entry and builds on a previous test series completed at [...]
An American flag is seen in front of NASA’s SLS (Space Launch System) rocket and Orion spacecraft at NASA’s Kennedy Space Center in Florida on Jan. 17, 2026, ahead of the historic Artemis II test flight. NASA will host a news conference at NASA Kennedy on Friday, Aug. 14, to highlight American leadership in space [...]
