Some astronomical questions, questions about astronomy

Stars are massive and emitting light, and more than 99% of the objects visible to the naked eye are stars, such as the Sun.

Planets do not emit light on their own, are less massive than stars, and orbit stars, such as the Earth.

Satellites have less mass than planets, orbit planets, and move with planets around stars, such as the Moon.

Meteors have a smaller mass and do not emit light, as is the famous Leonid meteor shower.

A comet is a very small object with a special appearance and orbit, such as Halley's Comet.

A nebula is a cloudy celestial body, such as the Orion Nebula.

There are more than 180 stars visible to the human eye around the world.

Hehe, I'm in a bad mood today, so I'll give it to you.

Planets revolve around stars, and the Earth is.

The so-called stars can be seen at night, these are all stars, and the sun is the same, but there are also a few planets in the solar system, such as Venus, Jupiter, and Saturn.

Satellites revolve around planets, like the moon is a satellite.

Comets revolve around the star, but their orbits are very long and flattened, usually seen only once in decades, such as Halley's Comet.

Stars are like the sun, which are glowing balls of gas that are heated by thermonuclear reactions.

As mentioned earlier, almost all stars that can be seen with the naked eye are of the Milky Way, and there are about 200 billion stars in the Milky Way, all of which are the same as the sun.

Nebulae are still visible to the naked eye, these are the same galaxies as the Milky Way, and only three galaxies can be seen with the naked eye.

I feel like you're interesting, hehe.

First of all, the stars are pulled out and not spoken! Stars are just a vague concept. All the cosmic objects we can see are called stars!

Planets are non-luminous planets that rotate and orbit stars! Generally solid, such as: Earth, Mars, Mercury ==

Stars are planets that rotate and emit light on their own, such as the Sun. It is usually gaseous (when you say stars, you are generally referring to stars).

Satellites are man-made and natural, the moon is the satellite of the earth, and the so-called satellite is the planet that revolves around the planet.

This man-made one, I don't need to say it!

A comet is a class of non-planetary cosmic bodies that orbit a star, and its composition is complex, with ice cubes, meteorites, and the comet does not actually emit light, but when it rubs against the planet's atmosphere.

After the universe is big ** (I agree with the view), a lot of vortex things (Milky Way, extragalactic galaxies, solar systems) are generated, and because of gravity and centrifugal force, the heavy ones condense together and slowly fly out of the vortex and become planets! The light ones come together in the center and eventually form a ball, and because of the density, the temperature rises to a very high level! So there are stars like the sun!

Stars are spherical or spheroid-like objects made up of hot gas that emit light on their own.

Planets: must be celestial bodies orbiting stars; The mass must be large enough that its own attraction must be balanced with the speed of rotation so that it is spherical; There can be no larger object within the orbital range.

A satellite is a natural or man-made object that orbits a planet.

Stars are a collective term for celestial bodies that are visible to the naked eye.

Comets are mainly stars with a diameter of tens of km to thousands of km composed of ice and cosmic dust, which are held by stars, and at the same time pull out a tail composed of ice blocks, and the real core that occupies most of the mass is difficult to see, and the mass of comets is very small, even the mass of large comets is less than 1/10,000 of the earth, and most of them are concentrated in the core part of the comet.

Stars are a collective term for the planets that people see in the sky, and it includes: stellar planets, star clusters.

Planets: 1. Must be celestial bodies orbiting stars;

2. The mass must be large enough, and its own attraction must be balanced with the rotation speed to make it spherical;

3. There can be no celestial body larger than it within the orbital range.

Stars: Stars are spherical or globular objects made up of hot gas that emit light on their own.

Satellites: Satellites are natural or man-made objects that orbit around planets.

Comet: Comet material is mainly composed of water, ammonia, methane, cyanide, nitrogen, carbon dioxide, etc., while the comet nucleus is composed of a mixture of water, carbon dioxide (dry ice), ammonia, and dust particles that have condensed into ice, making it a "dirty snowball".

We can see planets such as Venus, Jupiter, comets such as Halley's Comet, stars such as Polaris, Sirius, nebulae such as the Large Magellanic Cloud (only available in the Southern Hemisphere, not visible in the Northern Hemisphere), constellations such as Ursa Major, moons such as the Moon, and meteors...

There are more than 180 stars visible to the human eye around the world.

There are countless stars in total.

The Moon as seen by the human eye is a satellite, not a planet - -

The human eye can see some planets in the solar system, and those outside the solar system can only see stellar comets.

Why not go read a book? Are you afraid of becoming a nerd? Wouldn't it be that there are fewer and fewer nerds and more and more computer nerds now?!

It is recommended that you check the encyclopedia, which will help you.

Between 20 and 22 o'clock, the sky is full of stars.

The number of total lunar eclipses in each century is the second most common occurrence, with a solar eclipse occurring once in 3 years and a total solar eclipse occurring once in more than 300 years.

1. If a blueshift is observed, it means that it is approaching.

2 Supernova.

The center of the star begins to cool, it does not have enough heat to balance the central gravity, and the structural imbalance causes the entire star to collapse towards the center, causing the outer cool and the red layer to become hot, if the star is large enough, these layers will undergo violent **, producing a supernova.

3. Matter falling into a black hole emits radiation Observe the radiation.

4. First it becomes a red giant, then it becomes a white dwarf.

5 Nuclear fusion.

6 will become.

7. It seems that it will not form anything other than what you said.

1) According to the spectral color of the luminous light of distant stars, close to red is far away, close to violet is close, 2) do not know.

3) Method 1: Compare distant stars as a background, and compare them every day to find dark matter.

Method 2: When the black hole is close to the galaxy, it is directly observed that the engulfing of the galaxy causes the galaxy to distort and deform.

4) I don't know. 5) I guess it's fusion.

4 white dwarfs. 5. Nuclear fusion and nuclear fission.

That's all I know.

With the formation of cosmic garbage. Because there are substances that are absorbed. Sunspots become larger and are red giants. through fission.