Helen Hwang

NASA's STEREO spied a sun-grazing comet as ESA/NASA's Solar Orbiter flew through its tail.

A Prandtl-M prototype is air launched from the Carbon Cub aircraft March 13, 2020, at NASA’s Armstrong Flight Research Center…

From left Eric Becker watches as Nathan Sam, Robert “Red” Jensen and Justin Hall attach a Prandtl-M aircraft onto the…

Nathan Sam shows the Prandtl-M aircraft he helped fabricate at NASA’s Armstrong Flight Research Center in California.

Nathan Sam and Robert “Red” Jensen lay material into a Prandtl-M aircraft mold at NASA’s Armstrong Flight Research Center in…

The first of three Prandtl-M prototype aircraft was air launched Aug. 16, 2019, from an Aerostat blimp at NASA’s Armstrong…

Lightning flashes from a storm cloud to strike the ground. Such bolts represent only a small part of the overall…

APOD Science APOD APOD: 2020 June 4 –… Today’s APOD Archive Submissions Index Search Calendar RSS Education About Discuss …

The SpaceX Crew Dragon spacecraft carrying NASA astronauts Robert Behnken and Douglas Hurley lifted off at 3:22 p.m. EDT on…