How Government Geologists Recreated the Moon in Flagstaff, Arizona

From July 1969 to December 1972 the astronauts of NASA’s Apollo missions explored the alien landscape of the lunar surface, flag-planting, kangaroo-hopping, shuffling, digging, and Grand Prix-roving across six sites on the Moon. In order to prepare for their off-world adventures though, they needed extensive practice here on Earth so they would be ready to execute the…

Yes, We *Really* Went to the Moon in 1969

The Moon landings weren’t a hoax. Here’s proof.

Double Moon: Debunked

In what seems to be a newly-evolved form of the 15-year-old Mars Hoax people have recently been asking me about a “double Moon” that they heard is supposed to occur. I hadn’t come across it myself (maybe because I follow too much *actual* science news) but it sounded suspiciously familiar and, now being August, I figured…

NASA Releases Thousands of Hours of Apollo 11 Tapes

You’ve undoubtedly heard many times over the historic words uttered by Neil Armstrong when the Apollo 11 LM Eagle touched down in the Sea of Tranquility on July 20, 1969 and when he stepped off the ladder onto the Moon’s dusty, desolate surface later that same day, but the success of the Apollo 11 mission…

A Naked Titan Revealed by 13 Years of Cassini Data

Saturn’s largest moon Titan boasts the distinction of being the only moon in the solar system to have a thick atmosphere…so thick, in fact, that its surface is perpetually hidden from our view—but not from the view of the Cassini spacecraft’s infrared cameras! Cassini, now over ten months gone after its Sept. 2017 plunge into…

Meet Metis – Jupiter’s Closest, Quickest Moon

Everyone’s heard of Jupiter’s four most famous moons Europa, Io, Callisto, and Ganymede—we’ve known about them for over 400 years, thanks to Galileo—but giant Jupiter has many more moons than that. To date there are thought to be 69 natural satellites orbiting Jupiter. 53 are officially named, while 16 are awaiting further confirmation. So you’d…

ESA Grabs Glimpses of Mars’ Groovy Moon

This animation is comprised of three images acquired by ESA’s Mars Express spacecraft on Sept. 12, 2017 with its High Resolution Stereo Camera (HRSC). It shows parts of the grooved and pitted surface of Phobos, the larger of Mars’ two natural satellites. The original images were captured in greyscale; I added color based on other…

THEMIS Takes Deimos’ Temperature

Can you feel the heat? NASA’s Mars Odyssey can see it! This is an image of Mars’ smaller moon Deimos, captured with Odyssey’s THEMIS (Thermal Emission Imaging System) instrument on Feb. 15, 2018. Part of the 7-mile-wide Moon was in shadow, but the sunlit surface area reached temperatures up to 200 K (that’s still pretty…

This is Earth and the Moon from 40 Million Miles Away

That’s here; that’s home; that’s us—the two bright objects in this picture are Earth and the Moon, imaged by NASA’s OSIRIS-REx spacecraft on January 17, 2018 from a distance of 39.5 million miles (63.5 million km). This is about the distance between Earth and Mars at their closest points to each other (give or take…

OSIRIS-REx Sees the Moon Like We Can’t

On September 22 NASA’s OSIRIS-REx spacecraft made a “slingshot” gravity-assist pass by Earth in order to adjust the angle of its flight toward Bennu. Mission scientists took the opportunity to test out the spacecraft’s cameras with planned observations of Earth and the Moon, and I’m happy to report that everything worked out perfectly! Some of…

Black Hole Sun: Photos of a Total Solar Eclipse

Today, August 21, 2017, the Moon briefly slid in front of the Sun, casting its shadow onto the Earth–the deepest part of which (called the umbra) passing across the United States from Salem, Oregon to Charleston, South Carolina. I arranged to be positioned at the latter location, and thus experienced for the first time solar…