There's a huge amount of theory around electron orbitals, but to understand light there is just one key fact to understand: An electron has a natural orbit that it occupies, but if you energize an atom, you can move its electrons to higher orbitals. A photon is produced whenever an ...
In order to be able to locate celestial objects astronomers developed a system of coordinates that does not vary with the seasons. This is especially useful as the constellations appear to move higher or lower in the sky with the change of seasons....
But the stars are too far away to be useful as one of the two landmarks to triangulate from, as they generate almost no parallax and so cannot distinguish one location from another.Measuring the direction to the Moon would tell you which portion of the lunar cycle one was in, and would...
The North Star, also known as Polaris, is known to stay fixed in our sky.It marks the location of the sky's north pole, the point aroundwhich the whole sky turns. That's why you can always use Polaris to find the direction north. But the North Star does move. What's so special ...
“We are going to move quickly,” he said. “The reason we are going to do it that way is because it is more of a precision strike, it goes quicker.” Lead Art: Secret Service agents stand outside the campaign rally site in Pennsylvania where former President Donald Trump was shot on...
would also work if the two towns in question were not necessarily oriented along the North-South direction, and if neither town was on the tropic of Cancer; but unfortunately the original writings of Eratosthenes are lost to us, and we do not know the details of this more general argument....
What makes the North Star, Polaris, special to those interested in studying the night sky? a. It can be used to determine your longitude on Earth. b. It is the star straight overhead. c. It is the sta Why do magnetic lines of force, go from south to north internally? Why do...
The notion that the Earth was the center of the Universe is certainly an understandable one. To ancient people, looking up at the skies, it seemed evident that the Sun, the Moon and the stars rotated around the Earth once a day. For the Earth-bound observer, the ground that they stood...
Precession is the direction Earth's axis of rotation is pointed. (Image credit: NASA/JPL-Caltech) As Earth spins, its axis wobbles in a circle . This effect is called axial precession. As a result, in our era, the axis points in the North toward the star Polaris, which is known as...
However, because the north and south poles on Mars are oriented a bit differently than they are on Earth, the stars would appear to wheel across the sky on somewhat different paths. For example, the north polar axis of Mars does not point toward Earth's North Star (Polaris), but ...