Kappa Cassiopeiae speeds through the galaxy at 1,100 kilometers per second. It creates this bow shock, which is about 4 light-years ahead of its star.
The brightness of Mars in our sky depends on where our two planets are in orbit around the sun.
Scientists like to compare Earth and Venus. What happened differently at Venus to make it so harsh and inhospitable? These space weather explosions may help explain.
Scientists are still investigating the nature of the mysterious rock, which created a hole in the roof – and interior damage – in a house in Sri Lanka.
In case you haven’t heard, the planet Mars is back! Getting brighter. Nearly at its best. James McCue includes Mars in this cool video.
On February 20, 1962, John Glenn became the first American to orbit the Earth. He made three turns around the planet before returning safely.
An international team of astronomers sight huge clouds of gas orbiting supermassive black holes at the centers of galaxies. Watch a video depicting the swirling clouds.
This illustration shows our heliosphere – the sphere of the sun’s influence – moving through the space of our Milky Way galaxy.
Montage of time-lapse photography from the International Space Station, collected from many taken in Expeditions 29, 30 and 31.
What’s that very bright star or planet in the east before sunrise now? It’s the planet Venus, now near its time of greatest brilliancy.