What holds planets stars gas and dust together?

A galaxy is a huge collection of gas, dust, and billions of stars and their solar systems, all held together by gravity.

Which of the following is the biggest disadvantage of putting a telescope in space?

Which of the following is the biggest disadvantage of putting a telescope in space? Space telescopes are much more expensive than similar ground-based telescopes.

What force holds together the dust gas and stars that form a galaxy?

Our galaxy, the Milky Way, is typical: it has hundreds of billions of stars, enough gas and dust to make billions more stars, and at least ten times as much dark matter as all the stars and gas put together. And it’s all held together by gravity.

What does neap tide cause?

Smaller tides, called neap tides, are formed when the earth, sun and moon form a right angle. This causes the sun and moon to pull the water in two different directions.

What type of telescope can be used routinely on the surface of Earth during the day?

What type of telescope can be used routinely on the surface of the Earth during the DAY? Radio telescopes of modest size can’t make out as much detail (have a lower resolution) than visible light telescopes. How do astronomers overcome this limitation?

Does Neptune’s gravity affect Pluto’s orbit?

Because Pluto never gets close to Neptune, Neptune’s gravity can never alter Pluto’s orbit. Many objects in the outer solar system have resonant orbits with Neptune. About 70 Kuiper Belt objects (KBOs) also share the 3:2 resonance, and there are others in different resonances (such as 7:4, 2:1, 5:2).

Why can’t Neptune and Pluto collide?

The second reason that Neptune and Pluto can’t collide is because Neptune’s orbital period of 164.8 years means it makes three orbits for every two made by Pluto, with its 248.8-year orbital period.

How often does Pluto change its orbit around the Sun?

Pluto’s highly eccentric, oval-shaped orbit brings it inside Neptune’s orbit for a 20-year period every 248 Earth years. This switch, in which Pluto is closer to the Sun than Neptune, happened most recently from 1979 to 1999.

What kind of resonance does Pluto have with Neptune?

Orbital Resonance. Pluto lies in the 2:3 mean-motion resonance with Neptune: for every two orbits that Pluto makes around the Sun, Neptune makes three. The two objects then return to their initial positions and the cycle repeats, each cycle lasting about 500 years.