Gene KimJessica Orwig
Our planet's magnetic field is predominantly created by the flow of liquid iron inside the core. It has always been a feature of our planet, but it has flipped in polarity repeatedly throughout Earth's history. Each time it flips – up to 100 times in the past 20 million years, while ...
Magnetic field of Earth. (Image credit: alxpin via Getty Images) Magnetic fields are generated by the motion of electric charges, according to HyperPhysics. Electrons all have a fundamental quantum mechanical property of angular momentum, known as "spin." Inside atoms, most electrons tend to fo...
How and when is earth thought to have formed?Do the magnetic poles of the earth change?How do we know?What is "space weather',and how are we on earth protected from it?How are insolation and albedo related?What is going on in troposphere?Is the water cycle an aquatic?How does it ...
Pulsarsare a type of neutron star that appears to pulse due to beams of electromagnetic radiation and that are emitting from their magnetic poles. The pulsar test subjects spin very fast - around 44 times a second - and are 30% more massive than thesunbut are only 15 miles (around 24 ki...
are natural light displays in Earth's polar regions. They occur when charged particles from the sun — sometimes called solar wind — collide with gases in the Earth's atmosphere, producing colorful, dancing lights. These stunning displays are visible near the magnetic poles, creating a mesmerizin...
The Earth’s not a square, it’s a circle. You like circles. Today is gonna be a good day! Summary: The van der Grinten projection is a compromise map projection that is neither equal-area nor conformal. It projects the entire Earth into a circle, though the polar regions are subject...
Universal Time (UT) is a time standard that reflects the average speed of the Earth's rotation. It is not measured by clocks but by looking at the stars. Radio telescopes are used to determine UT. ©bigstockphoto.com/hongee Definition of Universal Time ...
It occurs when one of Earth's poles is tilted toward the sun at its most extreme angle, and due to Earth's tilt, this happens twice a year. In the Northern Hemisphere, the summer solstice falls in June (while the Southern Hemisphere experiences the winter solstice), and in the Southern...
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