How many square degrees are on the complete celestial sphere?
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Q: due southeast, what is the azimuth of that planet in degrees at that instant from their location?
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Q: If a star has an apparent magnitude equal to its absolute magnitude, how far away is it in parsecs?
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How many square degrees are on the complete celestial sphere?
The unit used to measure the solid angle is called the square degree.
The area of a sphere in the terms of the square degrees is given by
There is a conversion of degree in terms of radians.
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- Given exactly 360° in a circle and 365.24 days in a year, how many degrees per day does one's view of the night sky shift? (This assumes one looks in exactly the same direction, at the meridian - the middle of the sky defined by a line across it running due north to due south, at exactly the same time each night.)Imagine a giant ruler at the planet's distance that is 1 arcsecond across in your image. Given this angular length, and this distance to the ruler in AU, you can calculate the physical length of the ruler in AU. This will then allow you to convert your measurement of the semi-major axis from arcseconds to AU. 0/ 360° - length / circumference (of big circle) 360° 0 = angular length =1 arcsecond length............ describes the wobbling of Earth's axis of rotation over long periods of time. It takes roughly ........ years (don't include commas) to complete one full cycle. This means that the star Polaris will not always directly align with the North Celestial Pole.
- The two figures provided below show the motion of Stars A and B in the sky. Note that Star A is first visible above the horizon at noor In what direction is Star B moving at 3:00 am? Celestial Sphere Rotation Path of Celestial Star B Sphere Path of North Star North Star Star A 9 PM North Earth's' Horizon Equator Celestial Sphere Rotation A. west (to the left) B. east (to the right) O C. south (out of the page) D. away from the horizon (up) E. toward the horizon (down)How can we calculate the duration of an eclipseHow does the altitude of the north celestial pole relate to the observer's geographic latitude on the surface of the Earth?
- If Earth receives half as much light per unit area per unit time from Star A compared to Star B, what is the apparent visual magnitude difference between the stars?After considering that 24 hours of right ascension complete one rotation around the celestial sphere, how many degrees of the celestial sphere are swept out by 3 hours of right ascension?If you go out to look at the night sky tonight from central lowa, the North Star (aka Polaris) is located near the North Celestial Pole at an altitude of approximately 42 degrees above the horizon. Why is that the case?
- If you go on vacation down to the Florida Keys, the North Star (aka Polaris) located near the North Celestial Pole is found at an altitude of approximately 25 degrees above the horizon. Why is it found near that altitude?If a star’s parallax is 35 arcseconds, what is the distance to the star?Explain the 2 statements: the winter day sky is the same as the summer night sky, and the summer day sky is the same as the winter night sky.