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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 planet has the least variation in surface temperature?

Mercury has the least variation in surface temperature among the planets in our solar system. This is because it has almost no atmosphere to trap heat, leading to very hot temperatures on the sunny side and very cold temperatures on the dark side.

Does dirt or gravel exist on Saturn?

We know next-to-nothing about the surface of Saturn. We can guess that something at least resembling gravel exists there, because it exists on Saturn's moon Titan.

What force governs the motion of your solar system?

The force that governs the motion of the solar system is primarily gravity. Gravity, which is the attractive force between objects with mass, keeps the planets in orbit around the Sun and maintains the structure and dynamics of the solar system.

What fraction of the moon do we see during a quarter moon?

During a quarter moon, we see half of the moon's surface lit up by the sun. This is because the angle between the sun, Earth, and moon creates a line where we see only half of the illuminated side.

When will voyager 2 leave the solar system?

That kind of depends on where you consider the boundary of "the solar system" to be.

It's currently in the "heliosheath" and will probably reach the heliopause... which is one reasonable definition of "outside the solar system"... within the next ten years or so. Voyager 1, which is further away and moving faster, is expected to reach this boundary in about 2015, but Voyager 2 reached the heliosheath significantly closer to the Sun than Voyager 1 did... this boundary appears to be "dented" in the direction that Voyager 2 is heading.

Voyager 2 is well outside what most non-scientists think of as "the solar system" already... it's over twice as far from the Sun as Pluto is, for example.

What is the name of the new planet added in the solar system?

No new planets have been found near our Sun.

The latest discovery is a planet twice the size of Jupiter called Wasp 17. It lies about 1,000 light years from us.

See related link for more information

What outer planets have days Longer than 24hrs?

None of the four outer planets, they all have rotational periods shorter than 24 hours. The dwarf planet Pluto has a rotational period of 6.4 days though.

How dense is a blue star?

A blue star has a spectral class of O. It is one of the largest types of star on the main sequence.

As the colour is based on the surface temperature, and not on size, there is no definitive size.

However, using Alntak (See related link) - a star in the constellation Orion - as an example of a blue star, we can expect a blue star to be around 20 times as big as our Sun. (See related question)

See related link for a size comparison with our Sun.

How many planets are there in the solar system in the year 2011?

There are 20 planets in our solar system

1.murcury

2.venus

3.earth

4.mars

5.ceres

6.jupiter

7.saturn

8.neptune

9.pluto

10.2003 UB313

11.Nibiru

12.Xena

13.Makemake

14.2003EL61

15.Quaoar

16.Sedna

17.Eris

18.2005 FY9

19.Orcus

20.Varuna

What are the properties for the solar system's planets?

the inner planets (Mercury, Venus, Earth, Mars) all have rocky solid surfaces. The outer planets (Jupiter, Saturn, Uranus, Neptune) all have gaseous atmospheres and liquid surfaces. Pluto is very dense and has a rocky surface.

Is earth and sun in thermal contact?

No, the Earth and the Sun are not in thermal contact in the traditional sense. The Sun emits electromagnetic radiation which carries heat and light to the Earth through space. The Earth absorbs this radiation and warms up as a result.

What would the size of the moon be if the earth was the size of a basketball?

If the Earth was the size of a basketball, then the Moon would be about the size of a tennis ball in relative scale. The Moon is about 1/4 the diameter of Earth, so in this scenario, its size would proportionally shrink down as well.

How many dwalf planets are there in your solar system?

The are probably many we haven't discovered yet. However currently there are five known dwarf planets.

What celestical body is at the center of your solar system?

As proposed by the Heliocentric Theory, the Sun is the center of the Solar System.

How does the moon get smooth?

The moon's surface gets smooth through various processes such as impact cratering, volcanic activity, and erosion by micrometeorites. Over time, these processes help to reduce surface roughness and create smoother areas on the moon's surface.

What part of the earth system included dead and decomposed trees?

The dead and decomposed trees are part of the biosphere, specifically the forest ecosystems that make up the terrestrial component of the Earth's system. Once trees die and decompose, they contribute nutrients back into the soil, supporting new plant growth and completing the nutrient cycling process within the ecosystem.

What are the last 4 planets in the solar system called?

The four furthest planets from the sun are the gas giants; Jupiter, Saturn, Uranus and Neptune (being the furthest planet out). There are some dwarf planets beyond Neptune though, including Makemake, Sedna and Pluto.

What is the brightest star outside solar system?

The star outside the solar system that appears the brightest is Sirius. It's actually not all that bright (absolute magnitude 1.4, or about 25 times brighter than the Sun), it's just very close to us (only about 8 light years away).

The second-brightest star in the night sky is Canopus, which actually really is pretty bright (absolute magnitude -5.5 ... lower is brighter, and Canopus is almost 13,000 times brighter than the Sun); it's about 300 light years away, and it only appears to be slightly dimmer than Sirius because of its much greater distance.

However, even Canopus is nowhere near the grand champion R136a1, which has the lowest absolute magnitude (highest intrinsic brightness) known: -12.5, almost nine million times brighter than the Sun. You can't see it without a pretty good telescope, because it's not even in our own Galaxy but in the Large Magellanic Cloud, 160,000 light years away. If it were at the same distance as Sirius, it would be significantly brighter than the full Moon.

What are the 7 parts of the solar system?

"The Solar System may be divided by its components into three major components: the inner system, the near outer system, and the far outer system."

There are not 7 parts as such.

Why are you able to see planets in the solar system?

We can see planets in the solar system because they reflect sunlight, making them visible from Earth. Due to their size and proximity to the Sun, planets appear as bright points of light in the night sky. Telescopes also help magnify and clarify our view of planets.

Can you touch planets?

No, it is not possible to physically touch planets as they are massive celestial bodies existing in space. Additionally, most planets in our solar system are composed of gas, rock, and other elements, making them uninhabitable and impossible to land on.

What stage comes after nebula in the star stage?

The stage that comes after the nebula in the star's life cycle is the protostar stage. During this stage, gravity causes the gas and dust within the nebula to clump together and heat up, eventually forming a dense, hot core. This marks the beginning of nuclear fusion within the protostar.

What is the theory that states the sun is the center of the universe and the planets revolve around it?

The Heliocentric Theory is the theory that states the Sun is the center of the Solar System and all other celestial objects revolve around it. Supporting observations about the theory were by Galileo Galilei.

How often do planets align in your solar system?

To start, hopefully my solar system is the same as yours. There is no definite answer depending on how perfectly aligned you are asking. There was an alignment of sorts with 5 planets and the moon May 5th, 2000. The next one of those will happen in 2040. Including all the planets and a near perfect to perfect alignment, it's in the millions of years to trillions of years. For better information check out below: