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Uranus vs. Venus - Comparison of sizes
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Uranus vs Venus - Comparison

Uranus
Venus
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Uranus

Uranus

Diameter (km)50724
Distance to sun (km)2873550000
Equator (km)159354
Temperature123-23

Uranus is the seventh planet from sunlight. It has planetary mass that is fourth-largest and the planetary radius in the Solar System. Uranus is similar in composition and both have bulk chemical compositions which differ from that of the larger gas giants Jupiter and Saturn. For this reason, scientists frequently classify Uranus and Neptune as"ice giants" to distinguish them from the gas giants. Uranus' atmosphere is very similar to Jupiter's and Saturn's in its primary composition of hydrogen and helium, but it contains more"ices" such as water, ammonia, and methane, along with traces of other hydrocarbons. It has the coldest planetary atmosphere in the Solar System, with a minimum temperature of 49 K (−224 °C; −371 °F), and has a complex, layered cloud structure with water thought to make up the lowest clouds and methane that the uppermost layer of clouds.



The interior of Uranus is mainly composed of ices and rock.Like another giant planets, Uranus has a ring system, a magnetosphere, and numerous moons. The Uranian system has a configuration since its axis of rotation is tilted almost to the plane of its solar orbit. Where other planets have their equators its north west and south poles lie. In 1986, Uranus was shown by pictures from Voyager 2 without storms or the cloud bands related to the giant planets, as an almost featureless world in visible light. Voyager 2 remains the only spacecraft to see the planet. Observations from Earth have shown seasonal change and weather activity that was enhanced as Uranus approached its equinox. Wind speeds can reach 250 metres per second (900 km/h; 560 mph).

Source: Wikipedia
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Venus

Venus

Diameter (km)12104
Distance to sun (km)108200000
Equator (km)38025
Temperature437/497

Venus is the second planet from sunlight. It is named after the Roman goddess of love and beauty. As the thing in the night sky after the Moon, Venus may be, on occasion, visible to the naked eye in broad daylight and can cast shadows. Venus lies within Earth's orbit, and never appears to venture either setting in the west just after dusk or rising in the east a bit before sunrise. Venus orbits the Sun every 224.7 Earth days. Having a rotation period of 243 Earth days, it takes longer to rotate about its axis than any other planet in the Solar System and does so in the opposite direction to all but Uranus (meaning that the Sun rises in the west and sets in the east). Venus does not have any moons, a distinction it shares only with Mercury among planets in the Solar System.Venus is a terrestrial planet and is sometimes called Earth's"sister planet" because of their similar size, mass, proximity to the Sun, and bulk composition. It is different from Earth in different respects. It's the atmosphere of the four planets, consisting of over 96% carbon dioxide. The atmospheric pressure at the planet's surface is 92 times that of Earth, or roughly the pressure found 900 m (3,000 feet ) underwater on Earth. Venus is by far the hottest planet in the Solar System, with a mean surface temperature of 735 K (462 °C; 863 °F), even though Mercury is closer to the Sun. Venus is shrouded by an opaque layer of reflective clouds of sulfuric acid, preventing its surface from being seen from space in light.



It might have had water oceans before, as the temperature rose because of a runaway greenhouse effect but these could have vaporized. The water has photodissociated, and the hydrogen that is free has been swept into space by the solar wind due to the lack of a planetary magnetic field. Venus's surface is a sterile desertscape interspersed with slab-like rocks and is periodically resurfaced by volcanism. Venus has been a significant fixture in human civilization for as long as records have existed. It has been made sacred to gods of many cultures, and has been a inspiration for writers and poets as the morning star and evening star. Venus was the first planet to have its motions plotted across the sky, as early as the second millennium BC.As the planet with the nearest approach to Earth, Venus has been a prime target for early interplanetary exploration. It was the first planet beyond Earth visited by a spacecraft (Mariner 2 in 1962), and also the first to be successfully landed on (by Venera 7 in 1970). The thick clouds of venus render observation of its surface impossible in visible light, and the detailed maps did not emerge before the Magellan orbiter's coming in 1991. Plans have been proposed for more complex missions or rovers, but the hostile surface conditions of Venus hinder them. In January 2020, astronomers reported evidence that suggests that Venus is volcanically active.

Source: Wikipedia

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