Thousands of years ago, photographers took pictures of the starry sky.

Bubble nebula NGC 7635

This 10 light-year wide bubble nebula is located in Hou Xian constellation, about 7 100 light-year away from the Earth. The radiation nebula is a kind of high-temperature gas cloud, and the atoms in the cloud are activated to a high energy state by ultraviolet rays from nearby stars. When they return to a lower energy state, they radiate energy.

In the bubble structure, the bright star located near the upper left corner point 1 1 is named "BD +60 2522" or "SAO20575". This star, also known as "Wolf-Rayet Star" or O-type star, is a supernova. This kind of star is usually very hot and usually ejects the outer gas layer at a very high speed, up to thousands of kilometers per second.

This target is dim, and the cumulative exposure time of narrow-band sho is about 5 hours.

M27 dumbbell nebula

What will happen to our sun in the future? The first clue about the end of our sun was discovered by accident in 1764. At that time, Charles Messier was sorting out a list of scattered objects to avoid being mistaken for comets. The 27th celestial body on messier's list-now called M27 or Dumbbell Nebula-is a planetary nebula, one of the brightest planetary nebulae in the sky. It is located in Vulcan and can be seen with binoculars. It takes about 1000 years for light to reach us from M27. About 6 billion years later, our sun will release its external gas and form a planetary nebula, just like M27, and its remaining core will become a hot white dwarf star that emits X-rays. However, the science of18th century is far from understanding the physics and significance of M27. Even today, many things about planetary nebulae remain mysterious, such as how their complex shapes are formed.

Shooting in Hongyuan, Sichuan in mid-July.

The cumulative exposure of Lrgb is about 3 hours.

Color and narrow band of seagull nebula IC 2 177

The Seagull Nebula (IC 2 177/Sh2-292) is a huge nebula located at the junction of the two constellations of Unicorn and Canis Canis major. The seagull nebula is quite similar to the eagle nebula in the serpent, so some people call it the eagle nebula.

It is an ionized hydrogen region with a nearly circular appearance and a Be star HD 53367 in the center. This nebula was discovered by Isaac Roberts, an amateur astronomer in Wales, who described it as "very bright, huge, irregular and loose".

Color narrow-band sho version shot at shangri-la remote observatory

Nanfengche M83 Yinhe

The M83 galaxy is1500 million light years away from the earth. It is a rod-shaped spiral galaxy. Two irregular spiral arms spread outward from a rod-shaped core, forming blue clusters on the spiral arms. Stars at different stages of evolution abound, and their powerful radiation squeezes the dust there into strips.

The shooting time of low latitude targets is relatively short, which tests the comprehensive shooting conditions.

Taken at Jifeng, Zhongjiang.

M64 black-eyed galaxy

Black-eyed galaxies, also known as sleeping beauty galaxies, are named after a spectacular dark dust belt in front of the core of bright galaxies. They are located in the back seat, about 654.38+700 million light years away from us. There are a lot of dark dust clouds in front of the bright nucleus, so it is nicknamed "black-eyed galaxy". The target of the galaxy is very small, and the requirements for the environment and shooting conditions are very high, so it is difficult to shoot a brilliant picture. This goal is relatively unpopular, and few people shoot it.

Taken in Jintang, Sichuan.

Eagle Nebula M 16 is located in Ursa major, which is also the star birth region and ionized hydrogen region of the Milky Way. Named after the shape of an eagle flying with wings. The famous nebula, located on the Sagittarius arm (or Sagittarius-submarine arm) of the Milky Way, is a celestial body that can be easily observed with binoculars or small telescopes.

Narrow-band shooting, sho plotting Hydrogen content is very rich.

Eagle nebula M 16

Eagle Nebula M 16 is located in Ursa major, which is also the star birth region and ionized hydrogen region of the Milky Way. Named after the shape of an eagle flying with wings. The famous nebula, located on the Sagittarius arm (or Sagittarius-submarine arm) of the Milky Way, is a celestial body that can be easily observed with binoculars or small telescopes.

Narrow-band shooting, sho plotting Hydrogen content is very rich.