The Black Knight Satellite and the Unanswered Questions in Earth’s Orbit ...

Dear EarthTalk: What is space debris, and can we reduce or eliminate it? – H.B., Troy, NY ...

Astronomers have identified a frozen, Earth-sized world circling a nearby sunlike star, a find that sharpens the search for ...

For more than sixty years, a tiny asteroid has been moving in step with Earth, hidden from view until recently. Astronomers now confirm that this small body, named 2025 PN7, is traveling in a special ...

There are about 15,000 satellites orbiting Earth. Most of them, like the International Space Station and the Hubble Telescope, reside in low Earth orbit, or LEO, which tops out at about 1,200 miles (2 ...

Earth will have a visitor within its orbit for the next several decades, according to astronomers. An asteroid named 2025 PN7 has become a "quasi-moon" to Earth, as it will be sharing an orbit with ...

SpaceX has submitted a daring proposal to the US Federal Communications Commission (FCC) to launch a constellation of up to ...

A NASA mission has spotted an Earth-size exoplanet orbiting a small star about 100 light-years away. The planet, named TOI 700 e, is likely rocky and 95% the size of our world. The celestial body is ...

Scientists continue to mine data gathered by NASA's Kepler Space Telescope, retired in 2018, and continue to turn up surprises. A new paper reveals the latest: a possible rocky planet slightly larger ...

Astronomers are testing a quieter way of searching for moons beyond the solar system, using careful measurements of motion rather than changes in ligh.