Every year in early January, Earth reaches the closest point in its orbit to the Sun, a moment astronomers call perihelion.
You're not imaging it. The sun has been rising later in Illinois following the winter solstice. But the days aren't getting ...
Earth reaches its closest point to the sun in its 2026 orbit on Jan. 3. The sun will appear larger in the sky than on any ...
Earth rotates once in about 24 hours with respect to the Sun, but once every 23 hours, 56 minutes and 4 seconds with respect to other distant stars. Scientists call this difference crucial to ...
Astronomers have found that the rotational profile of a nearby star, V889 Herculis, differs considerably from that of the Sun. The observation provides insights into the fundamental stellar ...