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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

What provides the centripetal force that keeps objects in orbit?

Centripetal force wants to move something towards the centre. So in a satellites case that would be the Gravity of the Earth. If you had a rock tied to a string you were spinning around, the Centripetal Force would be the tension in the string acting towards the centre.

What is the bluest planet in your solar system?

Neptune is often considered the bluest planet in our solar system due to its striking blue color. This hue is caused by the presence of methane gas in its atmosphere, which absorbs red light and reflects blue light.

What do astronamers study?

earth and space science is the study of earth and its place in the universe.some earth scientist study the forces that have shaped earth throughout its long history.others study earth's oceans or its weather.space scientist study the planets and stars that exist beyond earth.

True or false a light year is measured in distance?

False the light year is not a unit of time it is a unit of distance true.

What are the two names of the rovers that explored Mars?

The first one was a pathfinder named Sojourner. The second and third were named phoenix and phoenix 2. The 4th was a rover called Opportunity which was followed by Spirit which landed in Gusev Crater that's believed to have been an ancient lake. The last one and

Does pluto follow Kepler's second law?

Yes, Pluto follows Kepler's second law, which states that a planet will sweep out equal areas in equal times as it orbits around the Sun. This means that when Pluto is closer to the Sun, it moves faster than when it is farther away.

What is the yearly path through the stars taken by the Sun is?

That's the "ecliptic". It's an imaginary circular line in the sky that's inclined 23.5 degrees

to the Celestial Equator, and intersects the CE at the equinoxes. The constellations

along the line are the constellations of the Zodiac.

What planet has over 200 days a year?

The years for all the planets except Mercury (88 Earth days) are all "over 200 days", the closest one to that number being Venus at 225 Earth days.

How many times longer does a 1.5-M star fuse hydrogen in its core than a 15-M star?

A 1.5-M star will fuse hydrogen in its core approximately 7 times longer than a 15-M star because less massive stars burn hydrogen at a slower rate due to their lower core temperatures and pressures. This means they have longer main-sequence lifetimes compared to more massive stars.

What makes an object a planet?

To be considered a planet, an object must orbit the sun, be spherical in shape due to its own gravity, and have cleared its orbit of other debris. This means it dominates its orbital path and is not a satellite of another celestial body.

What is the most likely fate of a 25 solar mass Main Sequence star?

A star of 25 solar masses is most likely going to die in a supernova explosion which will throw half or more of its mass into space, and the remaining mass will become a black hole or neutron star.

Please note that since your body is made of carbon and other heavier elements such as iron, the atoms that are YOU have already been through a supernova explosion and were expelled from a dying star long, long ago.

How many times more surface area has capella than the sun?

Capella is about 90 times larger in surface area than the sun.

Which planet generates the most heat?

Jupiter generates the most heat among the planets in our solar system. This heat is mostly due to the planet's large size and mass, which causes gravitational compression and frictional heating in its interior.

What is name of your planet?

I am a digital assistant and do not belong to a physical planet.

The sun appears to move across the sky each day is it true or false?

If by "seem to move" you are referring to perspective then it is true, since the Earth rotates on an axis and revolves around the sun, if we do not know that it is the Earth that is moving, it would seem that stars move across the sky, except for the pole star Polaris, which is aligned with the north axis and remains "fixed" in its place.

What is it called when the moon moves in front of the sun?

The two points where the moon crosses the plane of the earth's orbit are known as the 'nodes' of the moon's orbit. If the moon happens to be near one of the nodes at the time of New Moon or Full Moon, then that's exactly when either a solar or a lunar eclipse can occur (respectively).

Why are the planets considered satellites to the sun?

Planets are not classified as satellites of the Sun. Satellites are objects that orbit planets, while planets orbit the Sun directly. Planets are considered celestial bodies that revolve around a star like the Sun.

What planet looks like a desert?

Mars is often referred to as a "red desert planet" due to its barren, desolate landscape that resembles a desert on Earth. Its surface is mainly composed of reddish-brown soil, rocks, and canyons, giving it a desert-like appearance.

Is our sun a small medium or large star?

Because it's so much closer to us than other stars.

The nearest star outside our solar system is about 278,000 times as far from us as the sun is.

And all the others are even farther than that.

If you take a little flashlight, hold it in front of your face, and shine it at your eye, it'll look

even bigger and brighter than the sun. It's all a matter of how near or far the object is.

Is there vacuum in between earth and sun?

No, there is no vacuum between Earth and the Sun. The space between Earth and the Sun is filled with the solar wind, which consists of charged particles and electromagnetic radiation. This forms the interplanetary medium, which is not a complete vacuum but very low density compared to Earth's atmosphere.

What are the planets mean temperatures?

Check out NASA's: "Planetary Fact Sheet" Web page. That's pretty good.

There are slight differences in the answers to this question, depending on the source of information that you use.

If gravity or inertia stop working what would happen to the earth?

If gravity or inertia were to suddenly stop working, the Earth would no longer be held in its orbit around the Sun and would go off into space in a straight line. It would no longer have the centripetal force needed to keep it in its circular orbit. The lack of gravity would also cause everything on Earth to float away into space.

What are the planets in order from sun to the last planet?

Sun, Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune, and (if you still consider it a planet) Pluto.

What does life support mean?

Life support is when the person body is in a really bad shape (like after a really bad car crash or overdose). They put a life support on the person life is supported by the machine- that why it is called a life support; supports life. Sometimes the person ends up relying completely on the machine and will never wake up. The doctor switch off the life support because the person life is dependant on it and they can never come off it- they will never wake up.