Which planet roughly the same size of earth has its own atmosphere?
If your planet Earth was the same distance from the Sun as Mars is would the surface of your planet be as cold as Mars is?
How would the size of parachute required for a space probe be different on Venus which has a thick atmosphere or on Mars which has a thin atmosphere?
The atmosphere of Venus is very thick, and a parachute would have much greater drag for a given size, than on Earth or Mars. So it could be smaller to achieve the same slowing of a space probe's descent. On Mars, a larger parachute would be required, but fortunately Mars, being a smaller planet, has much less gravity than Earth, so the parachute does not have to resist the same acceleration force (which is roughly…
it has a pretty color Venus is in many ways an anomoly in the solar system. Among its unusual traits is the fact that it has retrograde rotation; that is, all the planets rotate in one manner and Venus rotates in the opposite direction. It is roughly the same size and gravity as earth; it has an atmosphere (although you wouldn't be want to breathe it). It has been called the twin planet to our…
Earth supports life while Venus doesn't It's "greenhouse" effect makes it the hottest planet in the solar system. Earth and Venus are roughly the same size and mass, but Venus in much hotter (on the order of 400° C), with an atmosphere or carbon dioxide and sulfuric acid, and a very slow rotation rate (a day on venus is longer that a venus year). Not much of a vacation spot... Venus is hotter
The earth is made of rock. It's sometimes called the lithosphere, and litho means rock. A lot of the rock in the middle of the planet is molten, but liquified rock is rock just the same. The earth has an atmosphere, but it is not a "gas planet" in that sense. We look at the structure of the earth in geology and geophysics. And most folks associate geologists with rocks.
There is no limit. The atmosphere of the planet Venus is mostly carbon dioxide, and it is by far the hottest planet in the solar system, in spite of being so much closer to earth than the planet Mercury is. Fortunately, our earth will never suffer the same fate as Venus has, but it can still get much hotter than it is now.
Only God knows. A2. The whole Solar system is believed to have formed at roughly the same time, about 4.5x109 years ago. Much of its materials came from previous super novas. The Earth had a brush with a similar sized planet soon after initial formation, and from the debris, the Moon and Earth were constructed. This other planet we call Theia.
Why do the asteroids reach non vertically to the earth surface while colliding like that one which entered above Russians atmosphere and would it move non vertically if atmosphere is not present?
It has nothing to do with atmosphere. The earth and the asteroid are moving in roughly the same direction and the asteroid is not aimed at the center of the earth. Most asteroids will miss the earth, a few will pass close enough to enter the atmosphere then leave without hitting (some of these will explode before they can leave), others will hit at shallow angles. Perhaps one in a billion might hit near vertically.
Really none, there is no actual planet that has the exact same gravity, some can be close, like saying it Gforce was 2000, and another was 2000, but actually its like 2000.01010203053232 and 2000.21020103020310. Mars and Venus are roughly the same size as earth (and thus have about the same gravity), but I don't think any planet in our solar system is exactly the same as earth. Gravity is determined by mass; the planet in…