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Satellites operated by the U.S. National Oceanic and Atmospheric Administration watched Tropical Storm Francine strengthen as it approaches the Gulf Coast.

China has moved the launch of its Tianwen 3 Mars sample return mission up two years, to 2028. The new timeline suggests China could get Mars samples to Earth as soon as 2031.

The upcoming Full Harvest Moon on Sept. 17 will feature a partial lunar eclipse. Here's what to expect and how to see it.

A privately-funded space crew aiming to set several records in orbit may not include the first child in space, but they have her hopes, wishes and furry spacesuit-clad creation aboard.

A long-lost moon could explain why Mars is so different from the other rocky planets in the solar system.

SpaceX launched the history-making Polaris Dawn mission early this morning, and the nighttime launch made for some incredible imagery.

As August 2024 set another 20-year high for sunspots, recent solar flares have yet to top two solar flares from September 2017 that still hold unbroken records.

NASA's New Horizons spacecraft, which flew by Pluto in 2015, has offered the best-yet estimates of how dark deep space truly is.

The first phase of China's moon base will be completed around 2035 near the lunar south pole, and an extended model will be built by about 2050, if all goes according to plan.

SpaceX launched the four-person Polaris Dawn mission to orbit on Tuesday (Sept. 10) to carry out the first spacewalk ever performed by private astronauts.