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The Solar System

Ever wondered if there is life on Mars? Or if Jupiter has five moons? Look no further; here is the category concerning all questions about our solar system and the known planets!

4,302 Questions

What cause the moon to look a different color?

No, It doesn't. The way we see it can change though. As light passes through the atmosphere, it can be bent by the water molecules in the air and make the light from the moon appear yellow, red, orange or blue.

What is the largest planet our solar system?

Astronomers say they have discovered what appears to be an entirely new kind of planet, an extra-large gas giant unlike any known world in our solar system or beyond. "This questions our understanding of how giant planets are formed and evolve," said Robert Noyes, a senior physicist at the Harvard-Smithsonian Center for Astrophysics (CfA). The planet, dubbed HAT-P-1, is located some 450 light-years from Earth in the constellation Lacerta. It is the largest planet ever discovered and boasts a radius nearly 1.4 times larger than Jupiter's. HAT-P-1 is also the least dense of all known planets. "This planet is about one quarter the density of water," said Gaspar Bakos, a Hubble fellow at CfA. "In other words, it's lighter than a giant ball of cork. Just like Saturn, it would float in a bathtub if you could find a tub big enough to hold it, but it would float almost three times higher." Unlike more familiar gas giants, including those in our solar system, HAT-P-1 does not appear to have a solid core. The planet's large size and low density can't be explained by current theories of giant planet formation. Scientists suggest that additional heat in its interior could account for its "puffed-up" size, but as yet they can't explain how such heat could be generated.

What would happen if the earth stopped rotating and revolving?

If the Earths core stopped rotating, we will either freeze to death if we're away from the sun, or we'll boil to death if we're towards the sun.There will be no night or no day.

Why is there more sun at the equator?

The earth's axis is not exactly parallel with the axis of it's solar orbit. The earth tilts slightly. And that tilt is not constant, it varies between 22.1 and 24.5 degrees. For part of the year, the northern hemisphere tilts toward the sun, making the days longer in the north. This equates to the summer season in the northern hemisphere. At that same time, the southern hemisphere is tilted away from the sun. This is the winter season for the southern hemisphere. When the northern axis tilts away from the sun, the nights are significantly longer than the days. The day in which the tilt is closest to the sun is called the summer solstice for that hemisphere. The same day will be winter solstice for the other hemisphere. Midway between the two annual solstices are the equinoxes. An equinox is when the tilt is not pointed towards or away from the sun.

Which planet in our solar system has the shortest year?

In the solar system, Mercury has the shortest year (I think that's what you're trying to ask), at about 88 Earth days.


Extrasolar planets have been discovered with much shorter years; I can think of several that have 3-day "years". They're obviously orbiting very close to their parent star and are therefore very hot.

What is the presence of water in Saturn?

Yes, water ice has been detected in the atmosphere of Saturn.

How does the Moon's positions affect its phases?

I think I know what you are driving at, but your question needs some clearing up. When one thing "affects" something else, it usually means that the two things are independent, or if they are not completely independent, they are not completely overlapping.

For example, temperature affects the number of mosquitos and other insects that will hatch out in the spring. If we have a very very warm winter, the normal process that would kill off some of the eggs doesn't happen. As a result, more insects. Temperature and the number of mosquitos are pretty much independent realities, but one affects the other. Poor nutrition among children will affect the number of illnesses that the children will contract. Same idea.

The moon phases don't really have any kind of causal affect on eclipses similar to the affects mentioned above. In fact, moon phases don't really exist as concrete, physical things. They are just names we give to the appearance of the moon depending on what part of it we can see. If you were living in a colony on the moon, you wouldn't be particularly interested in moon phases as observed from earth. You'd be more interested in the moon "day", which would last about 29.5 earth days.

What happens is that the moon's phases are connected to lunar and solar eclipses. The phases don't cause or affect eclipses, and eclipses don't cause or affect phases. Phases and eclipses are all part of the same process of earth orbiting the sun, and moon orbiting the earth. If it is near the full moon, you will NEVER observe a solar eclipse. Clearly, the full moon happens when the earth is very nearly between the sun and the moon. That's why we can look up and see the fully (or nearly so) lit moon in the sky. However, full moon is often "Lunar Eclipse Season". If a lunar eclipse is going to happen, it must happen during a full moon. Again, one is not causing the other.

If it is near "new moon", that is, the moon's face is completely or nearly completely unlit by the sun, you will NEVER observe a lunar eclipse. New Moon happens when the moon is between the sun and the earth, and the three are lined up as closely as they are going to get. New moon is often "Solar Eclipse Season". If a solar eclipse is going to happen, it must happen at new moon. Again, one is not causing the other.

What r the planets of the solar system?

The major eight planets are Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune. The gas-giant planets have some moons as large as Mercury and the dwarf planets. Pluto was once considered a planet, but in 2006, it was re-classified as a dwarf planet, along with the asteroid Ceres and three distant Pluto-like planets : Eris, Makemake, and Haumea. Other candidates for the status are Sedna, Quaoar, Orcus, and Varuna : Sedna - The discovery of Sedna was not entirely unexpected, in that new technology is helping astronomers to look deeper into the void beyond Pluto to search out dark objects, some of them clearly sizable. If Sedna turns out to be as large as Pluto, which is still possible, then it would properly be called a dwarf planet. Pluto itself may be simply a large, spherical asteroid, accompanied by its relatively large 'moon' Charon. At the moment, Sedna is thought to be smaller than Pluto, but bigger than Quaoar, so it is by no means certain what will be decided for it in time. Sedna is currently at its closest approach to the Sun, or 'perihelion'. Its orbit is elliptical, but falls well within the boundary of the inner Oort Cloud at its most distant point. So it behaves somewhat like a planetary comet. This finding might cause astronomers to rethink the position and composition of the comet-cloud. Quaoar , Orcus, and Varuna - "50000 Quaoar" and "90482 Orcus"" also seem to have moons and all three have orbits that bring them closer to the Sun than the farthest points of Pluto's orbit. Orcus is sometimes referred to as the "anti-Pluto" because orbital resonance with Neptune keeps it on the opposite side of the Sun from Pluto. "20000 Varuna" seems to be the smallest of the current dwarf candidates. Ceres is the smallest dwarf planet. Ceres and the other asteroids of the Main Belt are much smaller than the larger planetary moons. When first discovered in 1801 Ceres was classified as a planet, but was later re-categorized as an asteroid until the category of Dwarf Planet was created in 2006.

When was the first solar system used?

It was first used by a random dude that invented it and now we use it, and we made it better, and blah blah blah.

What star is closest to your solar system?

Proxima Centauri, roughly 4.243 light years from our Solar System. Its a Red dwarf and is part of Alpha Centauri system which includes 3 stars. Alpha Centauri A and Alpha Centauri B are about 4.37 light years away. and the planet Eris is red it is about 3 billion miles away from the Sun and it is 1 billion miles away from our Earth.
Proxima Centauri

4.2421 light years away

Is Saturn A Gas Giant Or A Rock Planet?

Saturn is considered one of the gas giants because it consists primarily of a gaseous atmosphere, with a small solid core. The other gas giants are Jupiter, Uranus and Neptune.

What causes Solar energy to be trapped by gases in Venus's atmosphere causes .?

As carbon dioxide built up in Venus' atmosphere, more thermal radiation was trapped. The increasing heat released more CO2 into the atmosphere which trapped even more thermal radiation.

Which planet was once warm?

Short Answer:

Most or all planets had water.

Mars is the planet which almost certainly had significant liquid surface water for an extended period of time, perhaps for billions of years.

More information:

Perhaps all other planets, were likely formed with water but lost it.

Terrestrial Planets:

Mercury is just too close to the Sun to have ever had much water for very long, even at a time when the Sun was cooler than now.

Venus probably had water when it was formed and kept it for a few hundred million years, but then it was blown away by the solar wind. Water is a very light molecule and would disappear more easily than nitrogen, oxygen, carbon dioxide.

Earth has, of course.

Mars had water for a long time.

Gas Giants:

Jupiter, Neptune, Saturn, Uranus are gas giants and may have some solid rocky material but are primarily made from gas and various types of ice. Some of that ice is water ice, though that being below the gas surface is not well characterized.

Dwarf Planets:

Dwarf planets, like Pluto, are often made up of icy materials or at least have icy surfaces over rocky materials, but the Dwarf Planets have never been investigated at close range.

What do Pluto mars and mercury have in common?

Pluto Mars and Mercury have the following in common:

  1. They all orbit the Sun
  2. They are all ball-shaped
  3. None of them have any life on them as far as we know

What is model of the solar system has Earth at the center?

The geocentric. The two systems were the geocentric and heliocentric, the former with the earth at the solar system's center, and the latter with the sun. Because Copernicus championed the latter, it is often called the Copernican model.

What are two types of planets in our solar system?

There are the four inner, rocky planets are also known as the terrestrial planets. These are; Mercury, Venus, Earth and Mars. Then there are the four outer gas giant planets are Jupiter, Saturn, Uranus and Neptune. The inner planets are smaller and have a higher average density. The outer planets are much larger, but have no real surface - just atmosphere that gets thicker as you travel inwards.

Why are the sun and planets called the solar system?

We live in a solar system because it is named after the central star which is the Sun. Latin for sun is Sol. But the galaxy we are in is the Milky Way.

In the solar system the orbits of the planets are best describe as?

Planets revolve around the Sun. The Sun does not revolve or rotate around the planets. Planetary orbits are best described as an ellipse.

Revolving is when the planet goes around the Sun. Rotating is when the planet spins on its own axis. The Earth does one revolution in 365 days but one rotation in 24 hours.

What is the nearest galaxy to the solar system?

The closest galaxy that has planets is the Andromeda galaxy. It is the nearest galactic neighbor to the earth. The Milky Way has other planets too.

How long is a suns revolution?

Mercury:0.24 Earth Years (87.97 Earth Days)

Venus:224.7 Earth Days

Mars:686.93 Earth days

Jupiter:11.86 Earth years

Saturn:29.46 Earth years

Uranus:83.75 Earth years

Neptune:163.72 Earth years