Earth’s tilt is what causes the seasons; in the summer, when our planet’s pole is tipped toward the sun, the days are longer, ...

An elliptical orbit is stretched ... aerobraking could save mass and allow each spacecraft headed to Mars to take more supplies. In the grand arc of space exploration, aerobraking is not just ...

New research on the orbits of these mysterious asteroids near Venus stress the need for better space rock surveillance.

Simulations show that the stars’ tug could send Mercury, Venus or Mars crashing into Earth — or let Jupiter eject our world from the solar system.

Billions of years from now, the Sun will swell into a red giant, swallowing Mercury, Venus, and Earth. But that’s not the ...

A planetary system described as abnormal, chaotic, and strange by researchers has come into clearer view with NASA's James ...

Despite the offset sunrise and sunset times, the summer solstice is still the longest day of the year in terms of total ...

For the dwarf planet candidate, one trip around the sun takes over 24,000 years. Its orbit challenges a proposed path for a hypothetical Planet Nine.

As the years go by, the chances of Europa hosting life seem to keep going down. But it's not out of contention yet.

With 10 times the mass of our planet, and spending only part of its orbit in the habitable zone, Kepler-725c is very ...

Webb telescope captured a rare image of 14 Herculis c, one of the coldest exoplanets ever observed, revealing new insights ...

Summer will officially begin with this year's solstice on June 20. And on Wednesday, June 11, comes a "strawberry moon," the ...