Mark Zastrow, Author at Astronomy.com

Human Spaceflight

As it happened: Boeing’s Starliner touches down, capping return flight to Earth

How legendary dark-sky advocate David Crawford sparked the fight against light pollution

The International Space Station (ISS) in 2001, shown in orbit over Earth.

Human Spaceflight, Space Exploration

ISS astronauts briefly take cover after Russian satellite Resurs-P1 breaks up

Starship lifts off June 6 on its fourth test flight from SpaceX’s launch facility at Boca Chica, Texas. Credit: SpaceX.

Space Exploration

SpaceX’s Starship hangs on to make first successful reentry from space

Astrophotography, Observing, The Sun

Your best pictures of this past weekend’s aurorae

The northern lights glow serenely in the distance above trees in the foreground at Kohler-Andrae State Park in Wisconsin.

Observing, Science

How to see the northern lights and what they looked like this weekend

Exotic Objects, Milky Way, Science

The Milky Way’s central black hole could have a hidden jet

Odysseus on the Moon. The photo shows a piece of a landing gear leg that has broken off. Credit: Intuitive Machines

Robotic Spaceflight, Space Exploration

Odysseus traveled to the Moon, broke its leg, and still pinged Earth to tell the story

An artist's depiction of the rotation of hydrogen in a galaxy shows a round collection of colors to indicate the position of gases relative to the observer.

Galaxies, Science

Astronomers accidentally find a galaxy that hasn’t birthed any stars

SN 1994D in NGC 4526 was a type Ia supernovae imaged here by the Hubble Space Telescope. Credit: NASA, ESA, The Hubble Key Project Team, and The High-Z Supernova Search Team

Cosmology, Science

Supernova survey hints dark energy could be changing

Astrophotography, Observing

See the winning images of the Indian Astrophotographer of the Year contest

Image specialist Andy Saunders analyzed archival stills taken by the astronauts and was able to measure the distance of Shepard’s second shot. Credit: NASA/JSC/ASU/Andy Saunders

Human Spaceflight, Science, Space Exploration

Ask Astro: How far could a pro golfer hit a ball on the Moon?