Earth was hit by a coronal mass ejection last night, triggering a G1 geomagnetic storm and displays of the Northern Lights.
asking at each place how long its light takes to reach us here on Earth. The closest object to us is the Moon. Its average distance is about 240,000 miles, so light from the Moon takes (240,000 ...
That familiar urban glow means that most people on Earth never see a naturally ... and other astronomers argue that this wasted light destroys our connection to the stars. "I believe this has ...
How does the Earth generate its magnetic field? While the basic mechanisms seem to be understood, many details remain ...