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Planetary Science
Planetary Science is the study of Planets and the Solar System, a combination of Astronomy and Earth Sciences. Find questions about the different planets and more.
25,144 Questions
Hutton proposed that the Earth is shaped by slow and gradual processes that operate over long periods of time, known as uniformitarianism. Lyell built on this idea and argued that the Earth is much older than previously thought, with geological changes occurring through the same slow processes still at work today. Their ideas laid the foundation for modern geology and our understanding of the Earth's history.
Does a meteorite reflect light or emit light?
A meteorite reflects light like any other object; it does not emit light on its own. When a meteoroid enters Earth's atmosphere and becomes a meteor, it can emit light due to friction with the air, creating a glowing trail known as a meteor or shooting star.
What is an object that is smaller than a planet that orbits a star?
The smallest planet in the solar system is Mercury.
Various factors can affect the visibility of stars at night, including light pollution from urban areas, atmospheric interference like clouds or haze, and the natural dimness of some stars. Additionally, the human eye is limited in its ability to perceive faint objects in the night sky, so not all stars within view can be seen with the naked eye.
Why are the outer planets called jovian planet?
When the planets were beginning to form the strong solar wind of the young sun blew most of the hydrogen and helium out of the inner solar system. Some scientists believe that Jupiter, being the innermost of the gas giants, captured much of this outgoing gas, adding it to its mass.
Why is the moon located between the sun and earth?
The Moon is not necessarily located between the Sun and Earth.
About half of the time (half of the orbit of the Moon around Earth), the Earth is closer to the Sun than the Moon is. This is the case whenever the Moon surface is more than 50 % lit (more than half moon).
At full moon, the Earth is located almost on a straight line between the Moon and the Sun.
At some full moons, there is a lunar eclipse, where the Earth is located so close to a straight line between the Moon and the Sun and that the Earth casts shadow on the Moon.
Similarly, half of the time (half of the orbit of the Moon around Earth), the Moon is closer to the Sun than the Earth is. This is the case whenever the Moon surface is less than 50 % lit (less than half moon).
At new moon, the Moon is located almost on a straight line between the Sun and Earth.
At some new moons, there is a solar eclipse, where the Moon is so close to being on a straight line betwen the Sun and Earth that the Moon covers the Sun when seen from the Earth.
But the distance from the Moon to Earth is always much less than the distance from the Moon to the Sun. This is because the Moon orbits Earth in almost a circle with an average radius of 385,000 kilometers, whereas Earth (and with it, the Moon) orbits the Sun in almost a circle with an average radius of 150,000,000 kilometers.
The Sun is always around 400 times as far from Earth as the Moon is.
What planet has the most helium?
Jupiter has the most helium of any planet in our solar system, with about 24% of its composition being helium. The high concentration of helium is due to the planet's massive size and gravitational forces, which prevent the gas from escaping into space.
What objects other than the earth rotate?
Many celestial objects, like planets, moons, stars, and galaxies, rotate on their axes. This rotation causes phenomena like day and night on Earth, and changes in visibility of certain parts of celestial bodies.
Astronauts weight the same as they would on other planets?
Astronauts' weight would vary on different planets due to differences in gravity. Their weight is determined by the gravitational pull of the planet they are on, so they would weigh less on a planet with weaker gravity and more on a planet with stronger gravity.
What planet rings were first discovered by Galileo?
He Discovered The Jovian Planets ,i.e., jupiter, saturn, neptune and uranus
What star does not change its position with the seasons?
The bright star Polaris in approximately aligned with the Earth's axis of rotation and therefore does not change its seeming position when seen from the Earth, no matter the time of day or the time of year. It is always towards North. When you stand at the North Pole, the star will be approximately directly overhead.
There is no similar, bright pole star for the southern hemisphere.
Is mars and earth are the same?
No, Mars and Earth are two separate planets in our solar system. They have different sizes, atmospheres, temperatures, and surface conditions. Mars is known as the "Red Planet" due to its reddish appearance, while Earth is the only known planet to support life.
Does mars have Heavy atmosphere light atmosphere or no atmosphere?
Mars has a thinner atmosphere than earth but currently it's still able to have storm systems like wind and dust storms. Mars may have had an atmosphere as dense as Earth's at one time. On November 21, 2008, however, researchers announced new evidence that the atmosphere of Mars was and is still being stripped away by the Solar Wind.
Which planet is the only planet on which life is known to exist?
Earth is the only planet in the solar system where life is known to exist. It has a unique combination of conditions, such as liquid water, a stable atmosphere, and a suitable temperature range, that support the diverse forms of life found on our planet.
Why is there only 8 planets now?
As Pluto, a dwarf planet, is no longer counted as a planet, there are now only 8 known planets in our solar system.
It remains to be seen if the discovery of extra-solar planets affects how we classify objects within our solar system. Several hundred likely planets have been detected orbiting other stars, with the possibility that there are other solar systems like our own. By late 2011, a total of 599 exoplanets had been identified and another 1235 were pending corroboration.
Status of Pluto
Pluto is a dwarf planet in the solar system and the prototype of a yet-to-be-named family of Trans-Neptunian objects. From its discovery in 1930 until 2006, it was considered the ninth and smallest of the planets of the Solar System, both by the International Astronomical Union (IAU) and the general public. After much debate, the IAU decided on August 24, 2006 to reclassify Pluto as a dwarf planet, requiring that a planet must "clear the neighborhood around its orbit." Further observations may also affect the definition of Charon as a moon of Pluto, possibly the classification of the two as a binary planet.
What are two outer planets that are about the same size?
Uranus and Neptune are two outer planets that are similar in size. Both planets are known as ice giants and are similar in diameter and mass.
What is the largest non planetary body in solar system?
The largest non-planetary body in the solar system is Ganymede, one of Jupiter's moons. Ganymede is even larger than the planet Mercury and is the only moon known to have its own magnetic field.
What is the gas giant with more clouds?
Jupiter contains more mass than all the other planets put together. As it is a Gas Gaint it stands to reason that it has more clouds than any other planet in the Solar System that we know of at the moment.
How many meters and miles are in a light year?
1 light year = 9.4605284 × 1015 meters or 5.87849981 × 1012 miles.
How does the planet mercury revolve around the sun?
Mercury is tidally lock onto the Sun so it takes 87.6 to rotate.
Improved answer : Mercury takes about 88 days to orbit the Sun, but the rotation time is different. It rotates in about 58.65 Earth days.
About 50 years ago it was thought that the orbit time and the rotation time were the same.
To see Mars from Earth, you can look up at the night sky when Mars is visible. Mars is often visible to the naked eye as a bright red or orange-tinged object. You may need a telescope for a closer view of its surface features. Keep an eye out for Mars during its opposition, when it is closest to Earth in its orbit and appears brightest in the sky.
Which planet in itself contains the majority of the mass of all planets?
Jupiter is the largest planet, its volume is greater than all of the other planets combined.
Megrez the Faintest of the Big Dipper Stars is 66 light years away.
