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18 cze 2014 · This is also known as the orbital period. Unsurprisingly the the length of each planet’s year correlates with its distance from the Sun as seen in the graph above. The precise amount of time in Earth days it takes for each planet to complete its orbit can be seen below. Mercury: 87.97 days (0.2 years)
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- How Big is The Sun? 1.3 Million Earths Visualised
Since velocity is inverse to time, the distance from the sun would be proportional to the time to cover a small piece of the orbit. This is approximately true for elliptical orbits. The area swept out is proportional to the overall time.
9 paź 2008 · This is called retrograde rotation. The semimajor axis (the average distance to the Sun) is given in units of the Earth's average distance to the Sun, which is called an AU. For example, Neptune is 30 times more distant from the Sun than the Earth, on average.
26 cze 2008 · Kepler's Third Law implies that the period for a planet to orbit the Sun increases rapidly with the radius of its orbit. Thus we find that Mercury, the innermost planet, takes only 88 days to orbit the Sun. The earth takes 365 days, while Saturn requires 10,759 days to do the same.
21 paź 2024 · For a circular orbit, the angular momentum is equal to the mass of the planet (m) times the distance of the planet from the Sun (d) times the velocity of the planet (v). Since m*v*d does not change, when a planet is close to the Sun, d becomes smaller as v becomes larger.
23 sty 2023 · Average distance from the Sun: 1.4 billion km (9.58 AU) Orbital period (year): 29.46 Earth years; Orbital velocity: 9.69 km/s (6.0 miles/s) Rotation period (day): 10 hours, 39 minutes, and 24 seconds; Surface gravity: 10.44 m/s² (1.07 g) Surface temperature: -139 °C (-218 °F)
For Mercury, the closest planet to the Sun, its orbital distance, a, is equal to 0.387 astronomical unit, and its period, T, is 88 days, or 0.241 year. For that planet, a 3 /T 2 is equal to 0.058/0.058, or 1, the same as Earth.
