Seeing the Earth's rotation with the naked eye! This scene is so shocking

"I saw the earth's rotation with my naked eyes!"

Recently, photographer Gao Bo used an equatorial mount

Time-lapse photography of the Earth's rotation

Many netizens were amazed

“The beauty of nature is so stunning!”

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What is the principle behind recording the rotation of the earth with a camera? According to Gao Bo, this is achieved by using an equatorial mount to counteract the rotation of the earth, which causes changes in the view of the starry sky .

"Generally speaking, we can feel that the stars are moving, and the more intuitive reason is that the earth is rotating. When the camera carried by the equatorial mount keeps synchronization with the stars in the sky, the rotation of the earth is recorded."

In order to capture such a scene, Gao Bo stayed on the top of the mountain from 0:20 in the morning to 9:50 in the morning, which lasted nearly 10 hours.

Seeing such a stunning picture, many netizens are eager to try it. How to shoot a similar "Earth rotation video"? Gao Bo shared his "starry sky photography" secrets↓↓

01

On a moonless night

Climb to the top of the mountain to take photos of the starry sky

To photograph the starry sky, first of all, you need to choose a place with a wide field of vision . Generally speaking, you should avoid areas with heavy light pollution. If you live in a city, you can go to the suburbs of the city to find a place where you can photograph the Milky Way. Secondly, you need to choose clear weather . If you want to photograph the center of the Milky Way, the window period in the northern hemisphere is spring, summer, and autumn. Choose a clear night with high seeing (referring to the clarity of the image displayed by the telescope), and also avoid the days before and after the full moon, because "the moon is bright and the stars are sparse."

02

Photographing the stars

What equipment should be prepared?

A camera , an equatorial mount , and a tripod are three essential items for photography.

Photographing the night sky requires long exposure, and the exposure time of a photo may reach 20-30 seconds. During the exposure, if the tripod shakes slightly, the photo will be blurred. Therefore, it is important to choose a tripod with a high self-weight and strong load-bearing capacity .

In addition, when setting up a tripod, you need to try to avoid wind vents, slopes, etc., and find a solid ground for setting up.

If the shooting location is at the top of a mountain and strong winds are unavoidable, you can find stones to clamp the legs of the tripod to ensure stability.

Setting up a tripod is the basic guarantee for photographing the rotation of the earth, followed by setting up an equatorial mount on the tripod, and finally setting up the camera on the equatorial mount . These are the three modules. Gao Bo said that landscape photographers usually use equatorial mounts to photograph the starry sky and deep space. The use of the equatorial mount is very simple. When using it, find the North Star in the finderscope, align the polar axis, fix all the components, turn on the equatorial mount, and you can start shooting.

03

Don't go outdoors

How to shoot time-lapse photography?

Gao Bo introduced that you can also use a tripod + mobile phone to shoot time-lapse photography of the starry sky. He suggested using "clicker" type auxiliary software and selecting the professional mode for shooting mode . "Everything around you, such as the sunrise and sunset every day, the blooming and withering of flowers at home, and the hustle and bustle of the streets, can become the subject of time-lapse photography."

As a landscape photographer, Gao Bo is very obsessed with nature. "Wind and sun are commonplace, but after a muddy journey, it is worth it to be able to record the beautiful scenery in those hidden places for everyone."

Photographing the “most beautiful starry sky”

Have you learned it?

Source: "CCTV News" WeChat official account