We measure the extremely long distances between things in space by light years. A light year is the distance that light travels in one Earth year. Light travels at about 300,000 kilometres per second.

Neptune is called an “ice giant” because it’s mostly made of a thick, slushy mix of water, methane, and ammonia, which ...

“This is a big step in understanding the outer solar system,” said Dr. Rosemary Pike, lead researcher from the Center for Astrophysics | Harvard & Smithsonian. “It shows that even very distant regions ...

There are retrogrades that simply slow us down, and then there are retrogrades that ask us to stop, feel, and re-evaluate ...

Stars often whip their planets with solar winds and radiation, pull them ever closer with gravity and sear them with heat.

The solar wind pushes some of the gas and dust away from the comet, forming those beautiful tails we see. A comet actually ...

Sedna will make its closest approach to the Sun in 2076, giving us a rare opportunity to visit the planetoid before it drifts ...

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Amazon is selling two $180 zero-gravity outdoor recliners for $71, and they provide the 'ultimate outdoor comfort' "This chair has quickly become my favorite spot in the yard." ...

Wicked Gravity: The Learning Curve part II — Next level success Nellie Milfeld ascends an overhanging corner high on Freerider (5.13a, 3,000 feet) on El Capitan. (Chris Weidner – Courtesy photo) ...

The first and most obvious step would be to legislatively mandate the gradual reduction of gravity’s individual force as a person gets older.

At this year's Living Planet Symposium, attendees heard how ESA's Next Generation Gravity Mission could provide the first opportunity to directly track a vital ocean circulation system that warms ...