If a trillion (1012) asteroids, each 9 km in diameter, were assembled into one spherical body, how large (in km) would it be? Compare that body's size to the size of Earth given in its celestial profile
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If a trillion (1012) asteroids, each 9 km in diameter, were assembled into one spherical body, how large (in km) would it be?
Compare that body's size to the size of Earth given in its celestial profile.
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- What is the evidence that suggests asteroids might have geologically active surfaces?The planet Uranus was discovered in 1781, and Neptune, the next planet outward from the Sun, was discovered in 1846. Imagine you're an astronomer in 1846, and you start wondering if there's another planet out beyond Neptune. You decide to try and discover its existence using the same method that was used for Neptune. How will you do this? Group of answer choices You'll recruit a large number of astronomers to use their telescopes to carefully scan the sky in directions that are far from the ecliptic. The regions around the north and south celestial poles will probably be the best "hunting grounds" for the new planet. You'll examine Uranus and Neptune very carefully, on every clear night, for several years, to see if you can find any evidence that sunlight has been reflected off of the `new' planet, then off of Uranus or Neptune, before arriving on Earth. On rare occasions when Neptune passes in front of the Sun, as seen from Earth, you'll look carefully at the Sun (with a safe…How deep would be the eclipse caused by Jupiter transiting in front of the Solar disk, as observed from a distant star?
- The asteroid Ceres has a mass of 9.39 x 1020 kg and an average radius of about 473 km (4.73 x 102 km). What is its escape velocity (in m/s)? 2GM (Hints: Use the formula for escape velocity, V. ; remember to convert units to m, kg, and s.) r m/s Could you jump off the asteroid? Yes NoIf you were to record the spectrum of Saturn as well as the A ring, you would find light from one edge of the rings redshifted and light from the other edge blueshifted. If you observed a spectral line at a wavelength of 505 nm, what difference in wavelength (in nm) should you expect between the opposite edges of the rings? (Hints: The radius of the edge of the A ring is 136,500 km. Use the formula for orbital velocity,What is the difference in orbital velocity between Saturn's two coorbital satellites if the semimajor axes of their orbits are 151,400 km and 151,500 km?
- If you were to record the spectrum of Saturn as well as the A ring, you would find light from one edge of the rings redshift and light from the other edge blueshift. If you observed a spectral line at a wavelength of 525 nm, what difference in wavelength (in nm) should you expect between the opposite edge of the rings? (Hint: The radius of the edge of the A ring is 136,500 km. Use the formula for orbital velocity and the formula for the Doppler shift.) _______ nmIf a trillion (1012) asteroids, each 7 km in diameter, were assembled into one spherical body, how large (in km) would it be? (Note: The volume of a sphere = km Compare that body's size to the size of Eearth given in its celestial profile. d dEarthWhat is the maximum angular diameter of the largest asteroid, Ceres, as seen from Earth?