How big is Sirius, a quasar 20 billion light years away

Billions of light-years away from us is a class of the brightest objects in the universe, which shine at trillions of times brighter than the Sun, and they are called "quasars". There are a number of quasars that have been discovered so far, but strangely enough, none have been seen near the Milky Way where we live. In the distant past, there should have been quasars near the Milky Way.

So, what about them running to the **? Quasars can really be said to be "enigmatic celestial bodies". In recent years, with the advancement of observation technology, some of their conditions have been gradually clarified.

This article explains what quasars are, how they were born, and why they disappeared.

In the distant universe billions of light-years away there exists a class of celestial bodies, each of which appears to appear as only a "point" even in large telescopes: quasars. Quasars are found in the centers of a very small number of galaxies and emit intense light. In terms of luminescence, quasars are the best of all the celestial bodies in the universe.

A quasar is 1 trillion times more luminous than the Sun. What is this concept? The difference in luminosity between a quasar and the sun is like looking at the sun at noon and then looking at a 3rd magnitude star in the night sky.

The diameter of the luminous part of a quasar is no more than about a light year. For comparison, a galaxy is home to 10 million to 1 trillion objects, ranging from tens of thousands to hundreds of thousands of light-years in size. The size of a quasar is insignificant compared to the size of a galaxy, but the light emitted by a quasar is surprisingly larger than a galaxy.

For humans, quasars hide many secrets. With the advancement of observation technology, the veil of fog that covers it is being lifted little by little. "Among them, the largest contribution is an international astronomical observation project called the Sloan Digital Sky Observation Project (SDSS).

The project started in 1998 and continues to this day. Associate Professor Yoshiaki Taniguchi, Department of Astronomy, Graduate School of Science, Tohoku University, Japan, told us. The SDSS uses the telescope of the Apache Point Observatory in the United States to make a dragnet observation of the entire sky in 1 4 days to map galaxies within 2.5 billion light-years and quasars beyond.

As of early February 2006, the record for the most distant quasar observed by the SDSS is 100 million light-years.

Sirius "...Are you sure there is this?

In addition, "how big" is actually a question that scientists don't care much about; Besides, no matter how big the world is, it is not small.

The Earth's magnetic field will be impacted, and the world may be exhausted by electromagnetic storms. For the explosion of the supernova in the face of Zi Zheng Ying, it is inevitable that the earth plexus ball will be protected by the Taiji Cluster Yang system, which will inevitably cause some losses.

The earth will surely perish. Because ** will produce powerful debris, which will affect the safety of the earth.

To be safe and sound. Because Sirius is very far away from the Earth and will not affect the Earth after the eruption, the Earth will be safe.

Astronomers discovered the first "black galaxy", which consisted of a black cloud of hydrogen and bizarre particles, as well as a broken planet. This faint nebula lurks about two million light-years from Earth.

Joshua of the University of Berkeley, California. Simon, Timos Robbie, and Leo Britz observed a cloud of hydrogen called HVC 127-41-330 in Puerto Rico using the Aleswave radio telescope.

The nebula is spinning at a very fast speed, and it must have a strong source of gravity that is hidden, otherwise it will become fragmented in the high-speed rotation. Therefore, the researchers believe that the gas must contain at least 80 percent dark matter. And the gravity generated by this imaginary matter is used to explain why many objects in the universe can move at such high speeds.

If their reasoning is correct, it will hopefully solve a question in the theory of dark matter. Of the known groups of galaxies, only 35 dwarf galaxies are known, while the estimated number of galaxies formed by dark matter should be 500.

If most dwarf galaxies are black galaxies with no planets, it would explain why discoveries have not yet reached this number. HVC 127-41-330 and other similar air masses are lightless because they are too small. The lack of mass makes them gravitational enough to accumulate the gas to a certain density to form any planet.