The X-37B spacecraft’s latest mission was shorter than the last but tried several new maneuvers and approaches during its ...

The Moon will reach perigee, which is the point in its elliptical orbit where it is closest to Earth, on Saturday, March 29.

"The successful execution of the aerobraking maneuver underscores the U.S. Space Force’s commitment to pushing the bounds of novel space operations in a safe and responsible manner." ...

In most years, the first day of spring lands on March 20. However, in 2020 the spring equinox arrived on March 19. In 2021, it reverted back to March 20, with that date repeating in 2022 and 2023.

On March 29, skywatchers across parts of the Northern Hemisphere will be treated to a rare astronomical double feature: a ...

The vernal equinox marks the start of spring in the Northern Hemisphere — so does that mean this is the only day out of the ...