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How do I calculate the diameter of a planet in centimeters?
How do I calculate scaled planet diameters & planet-Sun distances?
How do you measure the distance between planets in the Solar System?
How do I calculate Earth size?
Calculate the scaled planet diameters and planet-sun distances for a solar system model. Enter scale or diameter or distance, select to show table and/or map below, select options, then press Calculate. Examples: Scale 1 : 100000000 or Sun Diameter = 10 cm or Neptune Distance from Sun = 1000 ft. Model scale: 1 :
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sun = dome diameter : India: Taj Majal: sun = dome inner...
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SOLAR SYSTEM CALCULATOR. To construct a solar system model, enter 5 (for example) in the scale factor box, click "Earth diameter" and you will have all the dimensions in terms of the Earth's diameter.
- Mercury
- Venus
- Earth
- Mars
- Jupiter
- Saturn
- Uranus
- Neptune
With a diameter of 4,879 km (3031.67 mi), Mercury is the smallest planet in our Solar System. In fact, Mercury is not much larger than Earth’s own Moon – which has a diameter of 3,474 km (2158.64 mi). At 5,268 km (3,273 mi) in diameter, Jupiter’s moon of Ganymede is also larger, as is Saturn’s moon Titan – which is 5,152 km (3201.34 mi) in diameter...
Venus is often referred to as Earth’s “sister planet“, and not without good reason. At 12,104 km (7521 mi) in diameter, it is almost the same size as Earth. But unlike Earth, Venus experiences no flattening at the poles, which means that it almost perfectly circular. As with Mercury, this is due to Venus’ slow sidereal rotation period, taking 243.0...
With a mean diameter of 12,756 km (7926 mi), Earth is the largest terrestrial planet in the Solar System and the fifth largest planet overall. However, due to flattening at its poles (0.00335), Earth is not a perfect sphere, but an oblate spheroid. As a result, its polar diameter differs from its equatorial diameter, but only by about 41 km (25.5 m...
Mars is often referred to as “Earth’s twin”; and again, for good reason. Like Earth, Mars experiences flattening at its poles (0.00589), which is due to its relatively rapid sidereal rotational period (24 hours, 37 minutes and 22 seconds, or 1.025957 Earth days). As a result, it experiences a bulge at its equator which leads to a variation of 40 km...
Jupiter is the largest planet in the Solar System, measuring some 142,984 km (88,846 mi) in diameter. Again, this its mean diameter, since Jupiter experiences some rather significant flattening at the poles (0.06487). This is due to its rapid rotational period, with Jupiter taking just 9 hours 55 minutes and 30 seconds to complete a single rotation...
With a mean diameter of 120,536 km (74897.6 mi), Saturn is the second largest planet in the Solar System. Like Jupiter, it experiences significant flattening at its poles (0.09796) due to its high rotational velocity (10 hours and 33 minutes) and the fact that it is a gas giant. This means that it varies in diameter from 108,728 km (67560.447 mi) w...
Uranus has a mean diameter of 50,724 km (31,518.43 mi), making it the third largest planet in the Solar System. But due to its rapid rotational velocity – the planet takes 17 hours 14 minutes and 24 seconds to complete a single rotation – and its composition, the planet experiences a significant polar flattening (0.0229). This leads to a variation ...
Lastly, there is Neptune, which has a mean diameter of 49,244 km (30598.8 mi). But like all the other gas giants, this varies due to its rapid rotational period (16 hours, 6 minutes and 36 seconds) and composition, and subsequent flattening at the poles (0.0171). As a result, the planet experiences a variation of 846 km (525.68 mi), measuring 48,68...
Calculate using a spreadsheet: Download the Scale Size Calculator spreadsheet (XLSX or CSV). Choose the size (diameter) you want Earth to be in your model (for example 10 cm). Create a formula in your spreadsheet that will calculate the diameter of (distance across) each planet in centimeters.
Calculator for the diameters of Sun, Moon, Earth and the planets in kilometers, miles and compared to each other.
Sun is scaled one meter (39") in diameter. Actual Size of Sun: 1,391,000 km (864,000 mi) AU (“Astronomical Unit”) is the average distance between the Sun and Earth: 150 million km (93 million mi) A little more than 100 Sun diameters will span the distance of one AU.
O offers a simple solution to scale our solar system. From a reference (diameter, distance, or scale), VOS O lists the diameters and distances scaled for all planets, the eccentricity of their orbit, and their respective positions around the sun at a given date (heliocentric longitude).
