There are 10,000,000 meteors tonight that pierce the universe, do you know? See?

Weibo's little joke, in fact, knows a little about astronomy, but it's actually very naïve.

Let's talk about 10,000 first, this is quite reliable, but the main problem is that it doesn't make sense. Meteoroids, the parent body of meteors, are not uncommon, and in the normal space of the inner solar system, they are about a dozen on the order of 10 9 cubic kilometers. Although we will hardly come into contact with such a terrifying unit as the cubic kilometer in our daily life, in the vast universe, a 1,000-kilometer-long cube is only a drop in the ocean, only one-third of the distance between the earth and the moon.

If you're interested in doing the math, you'll find that at this density (which rises by 1-2 orders of magnitude during the eventual activity of large meteor showers), tens of thousands of meteors fall to Earth every day.

Ten thousand wear the universe, it can only be said that the pursuit is the tension of words. Not to mention the universe, it is the solar system, and it takes at least 5-10 years for a comet to travel from Neptune's orbit to the inner solar system. The solar system is nothing compared to the Milky Way, and the Milky Way is nothing compared to the universe.

By the way, meteoroids are too small to ignore directly. It's like the Brownian motion of gas molecules, which run tens of thousands, hundreds of thousands, millions of turns in our room every day, but no one has the word "wear".

Non-standard description means that the amateur of the information publisher, for me a hobbyist, such an online article is unattractive, when you make a reason to look up at the starry sky, you can, but if you make an appointment with a partner, you will bear the consequences.

I don't think there's a meteor shower today.

Hehe, in fact, this question is more vague.

First of all, let's explain a concept: meteors generally refer to the phenomenon that meteoroids emit light and heat when they pass through the atmosphere at high speed, and when they rub violently with the surrounding gases. Because of its speed, the observer sees a slender trail of light.

If you're asking: Suppose you see a meteor on Earth, can you see it in the universe as well?

The answer is: Yes. As soon as a meteoroid passes through the atmosphere, it emits light and can be observed outside the atmosphere with sufficient clarity.

If you're asking: If you look up in the universe, can you see a meteor streaked by?

The answer is: basically not. Because the gas density in most areas of the universe is very small, close to the vacuum state, high-speed moving objects will not have violent friction with the surrounding air particles, and naturally there will be no meteor phenomenon.

Of course, there are some areas where the gas density is high enough that you can still see meteors when the conditions are met, but the scene is definitely different from that on Earth, and no one has seen it yet. Human technological civilization still has a long, long way to go.

ps: I don't know if the earth can support the day of human beings...

No, because the meteors we see are just bright light from the friction of meteorites against the atmosphere, and there is no atmosphere in the universe, so we can't see them.

No. For example, you are standing in the universe and there is a meteorite"Slide"Come here, then all you see is a meteorite. Because, what we see when we stand on the earth"Shooting stars"It is the spark caused by the friction between the meteorite and the atmosphere, and the universe is almost vacuum, that is, there is no atmosphere, so in such a situation, it cannot be seen"Popular".

However, if it were on another planet with an atmosphere, it would still be possible to see it"Shooting stars"Target.

Definitely not! Meteors are produced by the friction between meteorites and the atmosphere, and if there is no atmosphere in outer space, then you will definitely not see it!

No, meteors are meteors when they enter the atmosphere and rub against the atmosphere.

When a meteorite enters the atmosphere and rubs against the atmosphere, it produces a lot of light and heat, and we can see meteors. Not all planets in the universe have atmospheres, and on planets with atmospheres, we can see meteors.

Meteors can be seen in places where there is an atmosphere, and meteorites or ice cubes do not glow without friction with gases.

Comets can be seen in **.

I think it does, because there are some planets that also have atmospheres.

Yes, we're in the universe right now.

Today's maximum is the 16th day of the lunar calendar, the moon is close to 100% of the phase, and the distance from the radiant angle is less than 20°, which will affect the observation all night (if you have carefully watched the full moon's brilliance, you can appreciate that it can be fatal to astronomical observations). Moonlight will cover most of the meteors. And if you're in the city, the city's light pollution is also very impactful, and if the sky is basically dark red, you don't expect it.

Yes, you're a**observing.

Yes, but you won't be able to see it if the weather is bad, and it will be the most at twelve o'clock, so try your luck then.

Are there really shooting stars in the world.

Yes, but it's not easy to see.

Meteors are actually there every day, but there is no big meteor shower activity these days, so it is not suitable for the landlord to observe with the goal of watching the excitement.

There will be meteor shower activity tonight such as Perseid meteor group, Cygnid K meteor group, Capricorn meteor group, etc.

However, the Perseid meteor group, one of the three major meteor groups in a year, has gone downhill after its peak on the 13th, and the flow of the Cygnid K meteor group and the Capricorn meteor group is really small and has little observation value.

If the landlord goes to a place where you can see the stars in the sky, I believe you can see a few meteors overnight (I can always meet a few meteors every time I go out to observe, whether the purpose is to see meteors or not), but now it is really not worth it to go out to observe meteors.

If you want to see meteors, wait until the Geminid meteor shower on December 13.

3:36 a.m. 47°N E

The watchtower owner's wish came true after seeing it!

From 11 p.m. to 6 a.m. tomorrow, the time of sight depends on the place.

It is understood that August 13 from 1 o'clock to 3:30 o'clock is the peak time of the Perseid meteor shower. The active period of this meteor shower is from July 17 to August 13. The constellation Perseus rises higher just after midnight on August 13, when the Moon has set below the horizon, and there is no moonlight interference, and dozens of meteors can be seen every hour.

According to astronomers, the Perseid meteor shower is the best time to see it, and the summer nights are cool, so couples and astronomy enthusiasts can "count the stars" to their heart's content.

Because August 10 is the feast of the Holy Spirit of Laurent in the West, the Perseid meteor shower is also called "Saint Laurent's tears" in Western countries.

Zhao Zhiheng, director of the Tianjin Astronomical Society, said that there are meteors every night, but the number is very small, as few as a few as a dozen. There are three large-scale meteor showers in a year, the Geminid meteor shower on December 14, the limiter meteor shower on January 3, and the Perseid meteor shower on August 13, all three of which are theoretically around 100 meteor showers per hour.

Eleven point maximum. Meteors will appear before dawn.

They said it was ten to twelve o'clock, and I don't know if I could believe it.

There are meteors every day, usually about two per hour, which is much smaller than the 180 meteor showers per minute.

I probably wouldn't have seen a meteor too, but I haven't seen it yet, and I hope to see a truly beautiful meteor one day!

Everyone on earth knows it! Not only tonight, but also during the day.

Absolutely. It's just that you can't see it.