The sun’s current 11-year activity cycle has already peaked—but extreme outbursts from our star may still be in store ...

The Mechanics of Earth's Spin Earth rotates once in about 24 hours with respect to the Sun, but once every 23 hours, 56 ...

A powerful geomagnetic storm last week brought rare and bright auroras, which were observed even in Florida and Mexico. Lisa Upton, a heliophysicist from the Institute of Southwestern Studies, told ...

In a striking new view from space, the European Space Agency's Solar Orbiter has given scientists their first close-up ...

Space weather experts warn that solar activity will persist or even increase after solar maximum has ended and we enter a phase of the solar cycle dubbed the "battle zone." When you purchase through ...

Earth's regular seasons are primarily due to its axial tilt (obliquity) of approximately 23 degrees, causing variations in sunlight intensity across the hemispheres throughout its orbit. This ...

Based on the grazing view, the general consensus was that the plasma cells and the magnetic field shifted poleward more slowly than at the equator. But Solar Orbiter has shown that the speed is higher ...

When does fall begin in the Northern Hemisphere? Whereas a meteorologist might tell you Sept. 1, the beginning of meteorological fall, an astronomer will inform you that seasons pivot on solstices and ...

NASA and NOAA jointly announced that the Sun has reached the peak of its 25th solar cycle, characterized by significantly higher activity than the previous cycle, evidenced by increased auroral ...

This Thursday will dawn like any other in Hawaii, with surfers catching the crests at Kona and sun worshipers settling in for some serious bronzing. Invisible in the bright morning light, the moon ...

Dr. Charles Greeley Abbot, of the Smithsonian Institution who last Spring made scientific history with his measurements of the sun’s heat (TIME, May 5), has now, from the Mt. Wilson observatory, ...