The Quadrantid meteor shower peaks in early January, offering dazzling fireballs and up to 120 meteors per hour.

An astronomical unit is 284 million kilometers, the average distance between the Earth and the sun. Astronomers shared that the comet is also approaching its closest point to the sun, a little ...

A sphere which had a radius of 1 astronomical unit (the average distance between Earth and the sun) would require more material than exists in the entire solar system. It is far more likely that ...

While previous studies have analyzed this possibility by focusing on the infrared spectrum, a new study expands the possible ...

Its highly elliptical orbit around the sun brings it as close as 1.03 astronomical unit (AU) to our home star and as far out as 10.37 AU. (One astronomical unit is the average distance between ...

The energetic flare, which lasted approximately three days and suggests an emission region of less than three light-days in size (~170 AU, where 1 Astronomical Unit is the distance from the Sun to ...

The winter solstice marks the start of the astronomical winter each year between Dec. 21 and Dec. 22. In meteorology, the official start of the winter season is on Dec. 1, the beginning of the ...