Large galaxies, like the Milky Way, attract smaller galaxies. Our solar system 's cosmic neighborhood spans 100,000 ...

There's nothing innate about the Earth or its atmosphere that marks the boundaries of low Earth orbit. This is a distinction ...

The probe will orbit the sun "close enough to pass inside a solar eruption, like a surfer diving under a crashing ocean wave, ...

"The findings not only provide further evidence to support the theory of a Martian ocean but also present, for the first time ...

After a decade-long search, some scientists say a growing number of clues point to the existence of a hidden planet in the Kuiper Belt beyond Neptune — and they may soon have the opportunity to find ...

The skyscraper-sized rock will travel by the planet from a point 2.8 million miles away, NASA said. A diagram shows its orbit around Earth, the sun and several other planets nearer the sun in the ...

Scientists have developed a new method to compute how tides affect the interiors of planets and moons. Importantly, the new ...

All of this is taken into account in a common type of diagram called the "pork chop ... possibly go if your aim is to eventually orbit your target planet. Spacecraft need to arrive slow enough ...

The skyscraper-sized rock will travel by the planet from a point 2.8 million miles away, NASA said. A diagram shows its orbit ...

It sounds like something out of a science-fiction movie. For the past couple of weeks, Earth's orbit has been home to a "mini-moon" the size of a city bus. The celestial object is more than just a ...

Wanna see a trick? Give us any topic and we can tie it back to the economy. At Planet Money, we explore the forces that shape our lives and bring you along for the ride. Don't just understand the ...

This is a distinction created by humans to break up all the ways an object might orbit our planet. How it's defined can vary somewhat, but we are talking about space immediately outside the ...