What's another name for Tanabata? Ten strange celestial bodies in outer space, the north and south poles of the earth actually turn.

Other nicknames for Valentine's Day in China are: Begging for Cleverness Festival, Seven Clever Days Festival and Qixi Birthday.

1. Black Widow Nebula

Black widow nebula

An infrared photo taken by NASA's Spitzer Space Telescope shows the Black Widow Nebula. The Black Widow Nebula in the Compass constellation is composed of molecular gas and looks like a terrible spider. There are a large number of massive young stars in this nebula, which are located in the yellow area in the middle. The radiation generated by the star blows the surrounding gas into two "bubbles" in opposite directions, forming a bulbous "body" and "spider legs". In order to celebrate Halloween in 20 1 1, the editor of National Geographic magazine selected some strange celestial bodies for inventory, and the Black Widow Nebula was one of them.

Original title: Ten strange celestial bodies in outer space

2. Solon electric eye

Solon electric eye

In 2008, astronomers pointed the Hubble Space Telescope at Sauron magic eye and discovered a new planet. The name "Soren magic eye" comes from the magical blockbuster "The Lord of the Rings", which actually refers to the mouth of a fish. It is the brightest star in Pisces, about 25 light years away from the earth. Its fiery "iris" is actually a ring of matter formed by a planet around a star. A small bright spot in the ring is Jupiter-like planet Nanyuzui B. This photo shows the visible light of planets around another star for the first time.

3.corot-7b

corot 7b

The exoplanet CoRoT-7b can be called hell. Hot stone rain falls from the sky, with a vast lava sea on one side and the light from the stars baking on the other side forever. In 2009, scientists first described CoRoT-7b, the first exorocky planet discovered by scientists. CoRoT-7b is 0.5 million miles (about 2.5 million kilometers) away from its parent star/kloc-0, which is 1/23 of the distance between mercury and the sun. This planet is also affected by tidal energy, one side is always facing the surrounding stars, and the other side is always in darkness. According to astronomers' calculations, the temperature on the side facing the star reaches 4220 degrees Fahrenheit (about 2327 degrees Celsius).

4. scarlet moon

Scarlet moon

On June+10/October 1 1 day, 65438, a scarlet moon hung over Sweden. This kind of moon is called "hunting the moon", which is the first full moon after the moon is harvested (usually around the autumnal equinox). At this time in the northern hemisphere, the moon rises earlier than usual. The full moon in autumn provides enough light to help hunters chase their prey after sunset, so it is called "moon hunting".

5. Zombie stars

Zombie star

When a sun-like star dies, it swallows the outer gas, leaving behind a celestial body called a "white dwarf". Sometimes, the corpse of a star will be revived by absorbing material from nearby stars. This zombie star is called "type Ia supernova" by astronomers. White dwarfs will explode to form supernovae when they consume a lot of materials from nearby stars and reach the mass limit. The celestial body shown in the photo is called "Tycho supernova remnant", which is one of the most famous examples of type Ia supernova.

6. Bats in Orion

Bats in Orion

20 10 In March, astronomers from the European Southern Observatory took a picture of the "cosmic bat" while observing a dark corner of Orion, namely NGC 1788 nebula. Unlike nebulae that use their own heating gas to emit light, this nebula uses cold gas and dust to reflect and scatter the light of young stars inside. This photo was taken by the Rahila Telescope of the European Southern Observatory in Chile. Combining with three visible wavelengths, it reveals the bat's bright face and dim "wings" on both sides.

7. Black holes will devour each other.

Black holes will devour each other.

In NGC 3393 galaxy, two black holes confront each other and devour each other. In August, scientists from NASA's Chandra X-ray Telescope released this composite photo, showing the spiral galaxy NGC 3393. In the middle of this galaxy, two supermassive black holes separated by only 490 light years staged a similar "cosmic tragedy". Astronomers believe that NGC 3393 must have swallowed another galaxy with a smaller mass, which also has a black hole in the middle. These two black holes will continue to fight until one side destroys the other.

8. Little Ghost Nebula

ngc 6369

The ghost nebula NGC 6369 is the favorite of many amateur astronomers. Seen from the earth, it is a dim gas cloud, surrounding the corpse of a star and located in Ophiuchus. In this Hubble photo taken in 2004, the small ghost nebula shows more details and reveals the evolution of gas emitted by dead stars. The ultraviolet radiation produced by the star stripped the atoms in the gas and ionized the nearby area, forming a bright blue-green ring. The red area at the outer edge has a relatively low degree of ionization.

9. Enceladus

Mimas

Iapetus is one of Saturn's many moons, and its surface is uneven. The crater shown in the photo is called Herschel, and its diameter is about 80 miles (about 130 km), which is equivalent to one third of the diameter of Titan. Astronomers believe that the impact that formed Herschel almost tore apart the 250-mile-diameter satellite.

10. vampire star

Blue straggler

There are a series of so-called "blue discrete stars" in our galaxy, which keep their young appearance by absorbing materials from other stars. Blue discrete stars are usually formed in dense clusters, and the stars contained in them are thought to have formed at about the same time, most of which are the oldest stars in the Milky Way. But blue also indicates that there are young stars in it. Scientists believe that these vampires "steal" gas from nearby stars and increase the mass of old stars, thus extending their life span by hundreds of millions of years.

At present, according to the remanence measurement of rocks on both sides of the submarine mid-ocean ridge (recording the paleomagnetism of the earth like a tape), geomagnetic inversion has appeared many times on the earth.

The reversal of the geomagnetic pole is a slow and gradual process. Note that the magnetic poles are opposite-not the north and south of the earth! The specific impact of inversion on the earth is still inconclusive, and personally, it is unlikely to cause disaster. For example, if someone gets down to the ground from a height of 50 meters, he will take the elevator slowly and steadily, and there will be no big problem. If it is jumping down ... at present, the geomagnetic change belongs to the situation of taking the elevator.

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