ESA's Solar Orbiter captured views of the planet Mercury passing in front of the Sun. Multiple instruments aboard the ...

The spacecraft collected new data on Mercury using its Mercury Radiometer and Thermal Infrared Spectrometer, or MERTIS. The ...

Mercury, the closest planet to the Sun, is full of unsolved mysteries. Using data from NASA’s MESSENGER mission, scientists ...

Project Mercury was NASA's program that launched the first American astronauts into space, completing a total of six crewed spaceflights. When you purchase through links on our site, we may earn ...

In astronomy, what does retrograde mean? And what connection does it have to astrology? We explain how planets move across ...

Ham the Astrochimp was launched from Brevard County for an 18-minute flight aboard a Mercury capsule that reached an altitude of 150 miles from Cape Canaveral.

Humankind accomplished new feats in space this year, including scooping up some of the moon’s farside and launching a probe to Jupiter’s moon Europa.

A depiction of apparent retrograde motion. Credit: NASA Mercury's southern hemisphere, as captured by NASA's MESSENGER spacecraft. Credit: NASA / Johns Hopkins University Applied Physics ...

Venus dazzles as the "Evening Star," Jupiter reaches its brightest for the year, and the Geminid meteor shower peaks under challenging moonlit skies.

Slayton made his first space flight in 1975 as the Apollo docking module pilot of the Apollo-Soyuz Test Project (ASTP) mission. Donald "Deke" Slayton was one of the original Mercury 7 astronauts ...