The new book is on the shelves

Recently, according to the announcement of official website of the National Aeronautics and Space Administration (NASA), the Mars probe "Tenacity" landed on Mars on February 18, and sent back the first photo of the surface of Mars. It has aroused the interest of many space fans.

Man has made great progress since he explored the universe for 400 years in modern times. We know that no matter how spectacular the fireworks display on earth is, it will be eclipsed by supernova explosion; The universe is full of incredible substances, and neutron stars the size of sugar cubes weigh hundreds of millions of tons; There are also elusive black holes, dark matter, gravitational waves and so on.

Chandra X-ray Observatory, National Aeronautics and Space Administration, USA

Detect the interior of celestial motion

But these important celestial activities are basically high-energy events, and ordinary optical telescopes can't detect their interiors. In order to uncover their essence, we need the help of the X-ray Observatory. For example, the famous Crab Nebula emits bright light under visible light, but the core of Crab Nebula can only be revealed by Chandra X-ray observation. Its center is a neutron star with extremely high density and extremely fast rotation speed left by a supernova explosion.

Crab Nebula

With the help of Chandra's observation, we can know that if the neutron stars after the explosion of two massive stars are very close, their orbits will shrink until they merge, and gravitational waves will be generated, which is the so-called "time-space ripple". With gravitational waves, we can not only observe the universe through electromagnetic waves, spectra and other means, but also better understand various events and related information in the universe through gravitational waves.

Gravitational waves, also known as "ripples in time and space"

The Chandra X-ray Observatory of NASA, like the Hubble Space Telescope, is one of the four space observatory programs developed by NASA in the 1990s, which has played an important role in human deep space exploration.

In order to review and record the exploration achievements in the past 20 years, NASA Chandra X-ray Observatory published the book "NASA Deep Space Exploration: All Records of Chandra X-ray Observatory in 20 Years", which was introduced to China in March 20021year and published by Jiangsu Phoenix Science and Technology Publishing House.

Written by five scientific experts from the Chandra X-ray Observatory of NASA.

Experts from Purple Mountain Observatory of Chinese Academy of Sciences carefully translated it.

Written by five scientific experts from the Chandra X-ray Observatory of the National Aeronautics and Space Administration of the United States, this is a popular science work for the public, which shows the birth and death of stars, galaxies and clusters of galaxies and unexpected exploration results from micro to macro. It uses vivid pictures and intuitive and concise text explanations, so that readers can easily understand even profound problems such as dark matter and gravitational waves.

Cassiopeia a source

Cat's eye nebula image

The famous "Cheshire cat" Galaxy Group.

This book contains many astronomical photos taken exclusively and cooperatively by Chandra, including X-ray band maps and composite maps with other bands. The famous pillar of creation is a star-forming region of the Eagle Nebula. Chandra can find and identify hundreds of very young stars and generate this beautiful image of the birth of stars.

Stephen quintuple galaxy is a cluster of five galaxies, one of which is passing through other galaxies at a speed of 3.22 million kilometers per hour. The violent collision shock wave produced the X-ray radiation ridge detected by Chandra, thus forming a strange blue light arc.

The book was carefully translated and revised by experts from Purple Mountain Observatory of China Academy of Sciences. The professional knowledge and proper nouns in the book were researched in detail and the relevant data were updated. At the same time, some necessary notes are added for readers to better understand, which is an important introductory book for us to understand the key knowledge of the universe.