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Why does Venus have a smaller angular diameter when it is full than when it is crescent?
Wiki User
∙ 15y ago
When Venus is full, it is on the opposite side of the sun as seen from Earth. Since it is on the opposite side, it has an approximate distance of 1.7 AU. In the thin crescent phase, Venus is probably around 0.4 AU from Earth. So it would have a larger angular diameter. That is also why it appears so much brighter in crescent phase than when full -- it is much nearer.
Wiki User
∙ 15y ago
Wiki User
∙ 12y agoAs Venus comes around the sun, catching up with earth, it's crescent can be seen to appear larger but thinner over several nights of observation. This is because it is getting closer to us. When you can see more of Venus, it is further away, but at a closer approach it will be a thin cresant, but larger.
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What is the diameter of venus in km in scientific notation?
The diameter of Venus, the second planet from the sun, is approximately 12,103.6 kilometers. This is very close to Earth's diameter (12,756.6 km). Here are comparative diameters of the eight major planets: Mercury 4,880 km Venus 12,104 km Earth 12,756 km Mars 6,794 km Jupiter 142,984 km Saturn 120,536 km Uranus 51,118 km Neptune 49,532 km
Why would an engine be less efficient on Venus than on earth?
Efficiency of a space engine is the ratio of power to weight / and power to thrust ratio , used in duct propulsion by conversion of heat energy into exhaust velocity. Space engines are thermo acoustic engines that use bi propellant or solid fuel. Engines use different heat conversion methods in chemical or electrical power to ionize atoms and create voltage gradient to accelerate the ions to high exhaust velocity. The high temperature in the Venus atmosphere 7530Kelvin/4600 C is the main cause of inefficiency in space engine that can only use only heat exhaust for propulsion. The other reasons for inefficiency of a heat propulsion engine is the dominant 96% CO2 + 4% Nitrogen with clouds of sulfuric acid in the atmosphere.
Which planet 's surface's is hot enough to melt lead?
the hottest planet is not the planet nearest to the sun, which is mercury. it is venus, the second nearest. it is very hot on venus because, unlike mercury, venus has an atmosphere. the atmosphere acts rather like the windows in a greenhouse, and helps to heat the surface of the planet. the temperature there is about 900 degrees, which i shot enough to melt several metals.
Who are earths neighbors?
Mars and Venus and the moon.
A planet closet in size to earth?
Venus is a planet that is closest in size to Earth. It has similar bulk composition and gravity to Earth too.
What planet has a diameter that is larger than the diameter of Mars but smaller than the diameter of Neptune?
There are two such planets: Venus and Earth.
Is Mercury as big as Venus?
No. Mercury is much smaller than Venus. Mercury has a diameter of about 4,800 kilometers. Venus has a diameter of about 12,000 kilometers.
Is Saturn smaller than Venus?
Nope. Saturn has a diameter of 120,536km and Venus has a diameter of 12,104km. Thus: Saturn is about 10x bigger than Venus.
Is planet Venus smaller or bigger?
... than Earth. Smaller. Venus' Mass is around 82% of Earths, while its diameter is a little smaller than Earths at around 95% of Earths diameter.
What is the size of planet Venus's?
Venus has a diameter of 12103.6 km (7700 miles) only 5% smaller than Earth's diameter.
How many miles is venus's diameter?
Venus has a diameter of about 7,521 miles, or 12,104 kilometers. This is only slightly smaller than the diameter of Earth, which is about 7,918 miles, or 12,742 kilometers.
Is Venus larger or smaller than Earth?
Venus' radius (and diameter) is about 95% the size of the Earth's. But because theylook so alike in shape and structure for many decades people believed that Venus'senvironment was like Earth's.
The diameter of the planet venus is about 650 km smaller than the diameter of earth If earth's diameter is about 13000 km what is the diameter of Venus?
The diameter of Venus is about 95% of the diameter of the Earth. Venus is 12103.6 kilometers in diameter from any reference. (Its slow spin does not produce a bulge.) Earth has an equatorial diameter of about 12756.2 kilometers and a polar diameter of about 12713.6 kilometers.
What four plants have a smaller diameter then earth?
There are only 3 smaller than Earth Mercury Venus Mars
What inner planets are similar to size and mass?
Venus has almost the same mass and diameter as the earth.
Is venus much bigger or smaller then planet earth?
Its only a little smaller than the Earth, about 95% of the Earths diameter.
How large is Venus?
It isa bit smaller than Earth, diameter 0.949 times Earth's.
