Q&A on how many planets in the universe

• How many stars are there in the universe?

  At present, no one can say clearly that the Milky Way alone will be hundreds of billions

  astronomy

  1 answer

• star

  no human beings know.

  astronomy

  1 answer

• How big is the universe? How many planets are there in the universe

  If we can travel through the solar system by spaceship, we will see the stars we once admired, which should be called stars accurately. The nearest star is the neighboring star in the constellation Centaurus, 4.3 light-years away from our earth. The speed of light can run 30 kilometers per second, even if we sit on a spaceship that is as fast as light, It will take 4.3 years to get to Bilin Star. Astronomers say that the sun and Bilin Star are just two small stars in the corner of the Milky Way, like

  astronomy

  7 answers

• How many planets are there in the universe?

  The answer is that scientists do not have the ability to figure out how many. And its quantity can not be expressed by the existing mathematical digits

  astronomy

  1 answer

• How many planets can live in the universe

  Countless, only we find and accept

  astronomy

  1 answer

• How big is the universe?

  10 to the 22nd power stars

  astronomy

  1 answer

• How big is the universe

  An astronomy textbook said that we can see an extragalactic galaxy 15 billion light years away. If we take this as the radius, we can see 300 light years. It is not sure whether we are the center. There is no way to answer how big the space of the universe is, only how big it can be seen. Let philosophy do the rest.

  astronomy

  3 answers

• What planets are there besides our earth? I want to know how many planets there are in the universe, and what are their names?

  Too many... stars, planets, satellites, asteroids, comets... I just focus on the stars. I give four naming methods: 1. Western naming methods: XX alpha and beta stars (twenty-four Greek letters are used from bright to dark, and more constellations are special), XX 1, 2 stars (from the west to the east from the beginning). For example, Polaris is Alpha Minor, and the companion star of Kaiyang is 80 Ursa Major. This naming method is used for the naked eye to see more than 6 classes

  Earth science

  1 answer

• How many planets are suitable for human life in space?

  Five billion years later, we must find a new home in the wonderful new world. We need to change other worlds to rebuild the earth we abandoned. In the distant future, the sun will become a ferocious monster, burning all the life cards on the earth, destroying our world, and finally, the sun will destroy itself. It can be expected that one day our sun will grow old. When this day comes, we will die with it. So it's time to plan for the future. Too

  astronomy

  1 answer

• What planets are there besides our earth?

  Too many... stars, planets, satellites, asteroids, comets... I just focus on stars. I give four naming methods: 1. Western naming methods: XX alpha and beta stars (twenty-four Greek letters are used from bright to dark, and more constellations have special features), XX 1 and 2 stars (from west to east, they become better from the beginning). For example, Polaris is Alpha Minor, and the companion star of Kaiyang is 80 Major. This naming method is used for more than 6 classes visible to the naked eye

  Earth science

  1 answer

• How many planets are there in the universe???

  There are about 100 billion stars in the Milky Way, and hundreds of billions of extragalactic galaxies similar to the Milky Way have been found.

  astronomy

  1 answer

• How many systems are there in the universe? How many planets are there in each system? (Now known)

  Everything is in constant motion - there is life and there is death. So the answer to the question needs a definite moment. The starlight we observe is not the starlight at the same time due to different distances. For example, human beings on earth have been observing the whole universe continuously since one million years ago. A star map of a million years shows the sky within a million light years. The star map of 100000 years has stars within 100000 light years. There are ten thousand lights on the ten thousand year star map

  astronomy

  4 answers