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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

Why can both the sun and earth be treated as blackbodies?

Both the sun and earth can be treated as blackbodies because they absorb and emit radiation at all wavelengths. A blackbody is an idealized object that absorbs all incoming radiation and emits radiation based on its temperature, which is true for both the sun and earth to a certain extent.

Which planet is the coldest Mercury Venus Earth Mars or Jupiter?

Jupiter (in as far as we can measure into the atmosphere (it may be hotter near the core)
The mean surface temperature of Mars is 227 K
The mean surface temperature of Jupiter is 165 K

Which planet could fit nine earths?

In our solar system, the largest planet is Jupiter, which is about 300 times the mass of earth. In terms of volume, Jupiter is 1300 times larger. This is because, as a gas giant, Jupiter's average density is much less than earth's.

There are larger planets than Jupiter, however, orbiting other stars. In some cases it may be difficult to distinguish between a large planet and a small star. If Jupiter were about 13 times bigger, it might be able to undergo spontaneous fusion, transforming into a true star.

How many stars are in a supercluster?

A supercluster is a collection of clusters. There is no defined amount of clusters.

A cluster could have up to 10 trillion stars, so a supercluster could contain around a quadtrillion stars.

What is the mass of a hammer on the moon?

The mass of a hammer on the Moon is the same as the mass of that same hammer on Earth - or in space, or anywhere else.

Which planet or bright object is visible in the eastern sky tonight on September 4th 2010?

Tonight on September 4th, 2010, the bright object you see in the eastern sky is likely the planet Jupiter. Jupiter is one of the brightest objects in the night sky and is often visible to the naked eye.

Do stars revolve Jupiter?

No, stars do not revolve around Jupiter. Instead, Jupiter orbits the Sun along with other planets in our solar system. Stars are distant celestial bodies that have their own orbits and are not affected by individual planets like Jupiter.

How did the planets start orbiting the sun?

There are three different theries of creation, but I can only remember two of them.

1> divine Creation- the theory that God created the planets and the life on them

2> The Big Bang Theory- the theory that all the matter in space hit together causing a big explosions which created the planets.

What planet is cold and is surrounded by clouds?

Neptune is the planet known for its extreme cold temperatures and thick, blue clouds in its atmosphere. It is the eighth and farthest planet from the Sun in our solar system.

Is jonnie Irwin of a place in the sun married?

Yes, Jonnie Irwin is married to Jessica Holmes. They have been married since 2016.

How far is Alpha Centauri from earth in cm?

Alpha Centuri is roughly 4.1626325x1018 centimeters from the Sun. The distance from the Earth varies depending on where we are in our orbit..

Is Jupiter bigger then other planets?

The environment of Jupiter consists of high pressure, and strong gravity and winds, and it is really cold. The average wind speed on jupiter is 100mph. The planet is entirely made of gas and the temperatures in the different layers of the planet can range from -200 degrees to 64000 degrees fahrenheit. Jupiter is also home to "The Great Red Spot" which is basically a giant hurricane that is the size of 3 Earths and has been blowing for 400+ years. Clearly, it would be an incredibly unpleasant place to be.

What is the ring of geothermal resources known as?

The ring of geothermal resources is known as the Ring of Fire. It is a region in the Pacific Ocean basin where a large number of earthquakes and volcanic eruptions occur due to tectonic plate movements.

What physical law describes the manner in which the intensity of sunlight changes as the observer moves away from the sun?

The physical law that describes how the intensity of sunlight changes as the observer moves away from the sun is known as the inverse square law. This law states that the intensity of sunlight decreases in proportion to the square of the distance from the sun. This means that the farther away an observer is from the sun, the weaker the intensity of sunlight they will experience.

Is it more difficult to notice the westward motions of stars that are high in the sky than those that are near the horizon?

Yes, it is more difficult to notice the westward motion of stars that are high in the sky compared to those near the horizon. This is because stars near the horizon have a longer apparent path along the sky, making their motions more noticeable over time. Stars directly overhead have a shorter apparent path, making their motion less apparent.

How much mass does Jupiter have compared to all the other planets?

Jupiter contains about 70% of the total mass of all the planets in our solar system. It is by far the most massive planet, with a mass that is more than twice the combined mass of all the other planets.

Energy from the sun is distributed around the earth by?

Sunlight is evenly distributed across the part of Earth that it is shining onto, considering that there are no other objects such as tall buildings or dark clouds blocking it. Most likely, the Sun would shine across half of the Earth, for example in the eastern hemisphere. However, sunlight might not be visible to those at the poles, due to the extreme angle at which it is shining. The Sun shines directly overhead at the equator.

What are those large oval circles in the solar system?

Oval circles in the solar system? Hm you may be talking about the oval lines that are shown in a simple edited solar system image. The oval like lines are the planets orbit trial in which they revolve around the sun.

How does a golf ball's mass on the moon compare to its mass on earth?

All weather is created under the atmosphere. The atmosphere contains wind and clouds etc. Since there is no atmosphere, there is no clouds or wind on the moon. Which means that there is nothing to create rain, snow or wind gales.

Which has the highest surface temperature red star white star or blue star?

The hottest stars are O type stars (aka Blue Giants) which have a temperature of greater than 30,000 kelvin and will have a colour of, as the name suggests, blue!

The hottest stellar remnant in the universe is the Neutron Star burning on creation at a temperature of over 1 billion degrees kelvin. However, the huge number of neutrinos it emits carries away so much energy that the temperature falls within a few years to around 1 million kelvins. It would appear white to the eye. The hottest stars in the galaxy are blue stars. The hottest stars in the galaxy are blue stars.

Is it true that the moon keeps moving ahead because of gravity?

Yes, the moon's continuous forward motion is a result of the gravitational pull of both the Earth and the Sun. This gravitational interaction creates a balance of forces that keeps the moon in its orbit and causes it to move in a predictable path around the Earth.

How does the sun illuminate the space station when it is on the opposite side of the earth at night?

It doesn't. The space station falls into darkness. However, you can still see it for a while if you catch it passing overhead just after the sun goes down or just before sunrise because, being so high above the Earth, it catches the sunlight for longer than someone on the ground and picks it up in the morning before anyone else. Neverthe less, you will never see the station passing over at midnight, because just like you and me, it's in the shadow of the Earth.

Why did Aristarchus make his measurements of the Sun's distance at the time of quarter moon?

Because when the Moon is at a "Quarter Phase", exactly half of the Moon's face is lit by the Sun.

That means the Sun-Moon-Earth angle is 90 degrees.

He could use that fact to estimate the Moon's distance by geometry.

Which of the four major spheres around earth are absent or nearly absent on the moon?

The atmosphere is nearly absent on the Moon. It has a very thin exosphere, but lacks a significant atmosphere like Earth's. Additionally, the biosphere is completely absent on the Moon as there is no known life there.

Is asteroid belt is a inner or a outer?

The asteroid belt is located between the orbits of Mars and Jupiter, making it an inner region of our solar system. It is primarily composed of rocky fragments and debris that did not coalesce into a planet during the formation of the solar system.