Is there a meteor shower tonight?

To answer this question, it is perfectly possible to excerpt the meteor shower activity table, excerpt the meteor shower activity in July, and explain a few terms by the way. In this way, it must be professional, comprehensive, descriptive, and clear, and there is no pressure to win the best.

But the question is, can this help the landlord? The answer is no. A few questions are enough to show that the landlord has never seen a meteor shower and asked many specious questions.

To get back to the point, the International Meteor Organization mandates 31 major meteor showers, with about 10 events in July. But I don't want to list their names and traffic one by one, because the vast majority of meteor showers, even if they have the title of "main", are still four words, not worth mentioning.

Fortunately, there is an exception to this meteor shower in July, that is, the Southern Aquariids δ meteor shower, which is at its peak on July 28, and the meteor shower in July can be said to stand out from the crowd, with a flow of about 20; Consider the airport's sister meteor shower at a similar time and radiant, and the total flow can reach 30-40. However, compared with the year-round meteor shower, it can only be said that Liao Hua is the pioneer.

From a personal point of view, if the purpose is to watch the excitement, this meteor shower is not too worthy of attention. The first is the mediocre flow, which determines that this meteor shower can only be relegated to the second rate; Moreover, because of this year's moon phase, although the moonlight is clear and bright, it is also the enemy of astronomical observation. The relatively objective statement is that "the moon and stars are rare", and the poetic one is "the river and the sky are free of fiber dust, and the lonely moon wheel in the bright sky".

Make a mathematical estimate to the landlord, if you come to the suburbs, the limit magnitude can only be equal to about (barely see the Milky Way) under the moonlight, and the number of meteors that can be seen from 11 o'clock to 4 o'clock the next day is about: 5 (observation time) * 30 (flow) * moonlight interference) * radiant height) = one, I don't know if this value is satisfied? If you are in the city, please also give a 3% discount on the original basis.

Below is a photograph of a Leonid meteor, which can be said to be quite shocking. Do you find any of the characteristics? The reverse extension of all meteor trajectories passes through a point called the radiant.

The constellation in which the radiant is located is called the XX meteor shower. As long as a number of meteors meet these properties, it can be called a meteor shower, and even if there are only a few meteors in one night, there is no correlation between the number of meteor showers.

Yes! It's 6 p.m. today!

Today is July 22, 2020, and there are no meteor showers today. The most recent meteor shower was on May 5 – the Aquariid meteor shower.

This annual meteor shower is caused by Halley's Comet, and the constellation is streaked very fast (66 kilometers per second!). But for observers in the Northern Hemisphere, the shower's radiant (in the Aquarius constellation) is relatively low and won't rise too much above the horizon.

Plus, it only rises a few hours before dawn. To make matters worse, this year's best time to observe it will be ruined by a full moon that hangs in the sky almost all night.

Just now I saw something like a meteorite, streaked across the sky.

Didn't you look at the time, at 4 a.m. to see more.

There was only moderate rain, it was raining all the time, and there were no meteor showers.

Yes, I'm afraid you won't be able to see it.