I Have a Store In the World of American Comics

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After painting Kuroko, we entered the final stage of preparation.

At this time, your eyes should be fixed on the eastern edge of the sun. When you see that the smooth edge is like a solar eclipse that is missing a small piece at the beginning, it means that the transit has begun.

The time should be recorded immediately, this is the circumscribed time of the transit (the moment when the eastern edge of the sun and the western edge of Venus are circumscribed), and trace the position of the circumscribed.

In the same way, you should also record the incision time of the transit time (the incision time between the eastern edge of the sun and the eastern edge of Venus), and trace the location of the incision.

At this time, the entire Venus was completely within the circular plane of the sun.

From this moment on, the position of Venus should be drawn on the same observation paper every half an hour, and the time should be marked on each position until the transit is about to emerge.

In the process, you can try to appreciate this once-in-a-century spectacle and see if you can see the halo.

The entire transit process will last for 6 hours. In order to ensure the safety of the instrument, do not always let the instrument work, and at the same time prevent heat stroke.

During breaks, close the lens cap, turn off the power and (if any), and allow the instrument to cool as much as possible.

Since projection observation does not use dark filters or at all, the temperature of the eyepiece often reaches hundreds of degrees!

Therefore, beware of burns and lens explosions, and do not approach the eyepiece with your hands.

The sun was slowly sinking towards the western horizon. Seeing that Venus was about to move out of the sun, the observation became tense again.

When going out, you should also mark the two tangent points just like going in. In our country, it is difficult to see the complete outburst in a large part of the area, but the sunset with Ling is also a good landscape.

If you see the whole Chuling, don't forget to record it!

If the sun's light is reduced too much by the fog, and the projection method cannot continue, you can use visual observation.

If you are interested, you can try to see Venus without a telescope.

At this time, the sun is often refracted to a large extent, and the angular diameter is close to an arc minute. The dark shadow of Venus is also very obvious, and people with poor eyesight can see it.

Surface of Venus:

As the sky darkened, the observation activity was drawing to a close.

Admire the beauty of the sunset, pack your things, and go home.

how about it? The harvest is not small!

If you observe carefully, you should get a full observation table. After you get home, organize the data, preferably write an observation diary, and when you look at it later, it will be a feeling.

If you don't seize the opportunity, it doesn't matter, there will be a Venus transit in 2012, you must pay attention, otherwise you will have to wait for more than 100 years!

Incoming and outgoing:

When Venus enters and exits the transit, careful observers may spot the so-called "black drop" phenomenon.

In fact, when we are facing the light and gradually approaching the two fingers, when they are very close, we can find that although the fingers have not touched, we can see that there are shadows between the upper and lower fingers connecting them, like between the fingers Like water droplets, this is the so-called "black drop" phenomenon.

When the inner and outer edges of Lingshi are inscribed, that is, when the edge of the sun and the edge of the inner planet are very close to each other and are about to touch each other, it will be found that there are very thin wires connecting the two edges, which is the black drop phenomenon during the transit. .

The cause is the blurring of the edge of the eye wheel caused by various effects such as the seeing of our atmosphere, the diffraction of light, and the "limiting resolution" of the telescope.

In addition, during the transiting and exiting stages, sometimes there is a very thin "halo" or "halo" on the edge of the Venus view.

This "halo" is formed by the reflection and scattering of sunlight at the top of Venus' atmosphere. It can be seen using the eyepiece projection method, but it will be clearer if you add a filter to the telescope. Changes in the size of the "halo", whether the rings are uniform in brightness, and whether they can be seen against the background of the sun wheel are interesting.

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Chapter 231 Announcement of Tony's Wonderful Night