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A planet orbits a sun, a moon orbits a planet
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What is a large object that moves around a star?
a planet DA
What star does the sun circle around?
The sun is not a planet that circles around a star. It makes part our galaxy, the milky way, which circles around itself. The circuit takes about 32,000 years.
How do you make nouns planet?
The word 'planet' is a noun, a singular, common, concrete noun; a word for a very large object that moves around the Sun or another star; a word for a thing.
How is the Doppler Effect used to detect invisible planets?
As a planet revolves around a star, it actually wiggles the star a bit (the bigger the planet, the more it wiggles the star). This causes the star to be moving towards as a bit, then away from us a bit (and repeat forever). As a star moves away from us, the Doppler effect (also known as a redshift) makes the star appear a little redder and as a star moves towards us, it appears a little bluer. If we see a star, getting a little bluer, then a little redder, then a little bluer again and so on, you know that the star is wiggling, and that would only be caused if the star has something in its orbit, like a planet. So even though we can't see the planet, we know it is there.
Do all planets go around the star?
Every planet in the universe rotates around a star. The Earths star is the sun, so it's the same for every planet.
What cause the difference in the lenghth of year among the planets?
A planetary year is defined as the time it take a planet to make one orbit around its star. The closer a planet is to its star the smaller the diameter of the circle of its orbit. In other words it has less far to go to make an orbit. Thus the length of a year is linked to how far out from the star the planet orbits.
What do you mean by elliptical trajectory?
Any planet that orbits a star ( our sun for example ) has an orbital trajectory. This is due to gravity and the centripetal force. An elliptical trajectory is when that planet orbits the star in an ellipse rather than a circle. Ellipse = squashed circle.
How can you tell something is a planet and not a moon?
A planet is in direct orbit around a central star, while a moon is in orbit around a large body (a planet) rather than in a direct orbit around a star. The moon orbits the planet, while the planet orbits the sun.
Is the moon a planet or a galaxy?
Neither -- the Moon is technically a satellite. It is in orbit around a planet. That planet orbits around a star. That star is one of billions of other stars which form a galaxy.
What planet star or solar system does Neptune rotate around?
That star would be the sun. That's why it's a planet in our solar system.
How is a planet orbiting another star detected?
a planet has it's own weak gravity that pulls the star it's orbiting as it orbits, as the star gets pulled around by the planet, scientist on Earth see the star wobbling, and then they know there is a planet!
Are planets fixed in space?
Certainly not, they revolve around a star and the star moves as well.
