# Tag Info

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The current longitudes of perihelion show no alignment. Furthermore, they change because all the planets have orbital precession - that is, the longitude of perihelion changes by between 0.36 arcseconds/year for Neptune (i.e. the longitude of perhelion goes through the full range of angles in 10,000 years) to 19.5 arcseconds/year for Saturn. So not only is ...

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The major axes of the planets are not aligned. The major axis passes through the perihelion, the solar system barycentre and the aphelion. So by looking up the Longitude of perihelion we can find the direction of the major axis: planet Longitude of perihelion M 77 V 132 E 103 M -24 J 15 S 93 U 171 N 45 ...

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The colour of a natural satellite is almost entirely based off the atmosphere and surface of the satellite. The moon Io, of Jupiter is not grey and is coloured because of sulfur on its surface that create a colour. Io has a very thin atmosphere. So that brings us to your question, why is the majority of natural satellites grey? We know that moon's colours ...

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The disk flattens from a 3d cloud to a 2d disk. A ring forms from a disk over-density band, reducing to a nominally 1d ring from a 2d band. The ring particles fall towards each other around the ring, and such attractions cause the ring to contract its circumference. The ring thus migrates inwards from the disk to the sun. Ring particles collide and the ...

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And the whole barycenter thing too. You're throwing out the definition of orbit at this point, and moving into a different realm. If you throw out barycenter, you have to leave me with my frames of reference. A star can definitely orbit a planet, if one such as this did in fact exist. You are assuming it is simply a planet-star system, which makes ...

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I think the answer is no. A star is much more massive than the most massive planet you could imagine. Take Jupiter as an example : it is a massive planet, with a gravitational pull so intense it makes the Sun move. Not that much, but it actually does. However, the Sun is not in the slightest orbiting any planet. For a star to orbit a planet, it would ...

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Would earth go the same way as Mars by first losing its magnetic field followed by its atmosphere as its core solidifies and cools down ? We don't know. The current popular belief is the Sun will engulf it long before that. It is merely a hypothesis, not a theory. At what rate is the earth's core cooling down?. According to today's set of ...

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At what rate is the earth's core cooling down? The inner core is cooling at the rate of around $55^{\circ} C$ every billion years. Would earth go the same way as Mars by first losing its magnetic field followed by its atmosphere as its core solidifies and cools down ? Given enough time, yes; But earth is constantly producing heat though multiple ...

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There could well be, since when we had nine planets we were looking for planet X (planet number 10). However, the modern day designation of a planet is: "is massive enough for its own gravity to make it roughly spherical (slight "oblate-ness"), and has "cleared its neighbourhood" of smaller objects around its orbit". Hence, we would more than likely discard ...

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From what I have read including this and this and this, some models predict a layer of liquid water. The presence of water (liquid or ice) is predicted based on the density measurement of 2.1 g/cm3 which is a little more than Ganymede, Titan, and Callisto and considerably less than Europa. Early in Ceres history it's interior would have been hotter due to ...

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