Zaizhigang was the first Chinese astronaut to complete the Shenzhou-7 space probe in 2008, while Wang Yaping had previously completed the Shenzhou-10 mission in 2013. China’s first female astronaut to visit the Chinese space station and performing extraterrestrial activities, Ye Guangfu is considered a new astronaut. that has just been to outer space for the first time but also participated in important missions such as Shenzhou-13 (Shenzhou-13) immediately
.
Watch the clip of the second astronaut’s mission. Shenzhou-13 (Shenzhou-13) Reach the world safely here https://www.xinhuathai.com/china/277125_20220416
Tag:
NASA
NASA estimates the size of a giant comet at 500 trillion tons
written by Alexandra Hartman Editor-in-Chief
NASA has found that the Bernardinelli-Bernstein Comet, discovered in 2010, is 500 trillion tons in size, more than 80 miles wide, and has a nucleus regarding 50 times larger than most known comets.
The agency’s Hubble Space Telescope first detected the massive comet C/2014 UN271 (Bernardinelli-Bernstein) in 2010, but scientists confirmed its size this week.
And while the comet is currently less than two billion miles from the sun and is heading toward Earth, NASA rest assured that it does not pose any threat to us.
Scientists have confirmed that it will not approach the sun by more than a billion miles, which is a distance slightly farther than the distance of the planet Saturn. And NASA said that won’t last until 2031.
The radius of the comet’s nucleus is 80 miles, and it travels at a speed of up to 22,000 miles per hour, and its temperature is (-193 degrees Celsius).
Comet Bernardinelli-Bernstein has an estimated mass of 500 trillion tons, which is regarding 100,000 times greater than the mass of typical comets found near the Sun.
Professor David Jewett revealed that this comet is literally the tip of the iceberg of several thousand comets too faint to be seen in the farthest parts of the solar system.
To check its size, the team used NASA’s Hubble Space Telescope to take 5 pictures of the comet on January 8, 2022.
Using a computer model, the researchers were able to accurately estimate its mass, as they believe it originated in the Oort Cloud – the most remote region in our solar system that harbors trillions of comets.
“It’s extremely close to Earth, but for our scale very far away.”
written by Alexandra Hartman Editor-in-Chief
A comet with a nucleus 50 times larger than normal and 500 billion tons that travels in direction near Earth it was detected by NASA, where it was described as the largest ever seen by the scientific community. The astronomer from the University of Chile, Cesar Fuentestalked with CNN Chile regarding the scope of this discovery, assuring that it is a low-risk event for the planet. “This close is a relative term with respect to where this comet lives most of its time. It is extremely close to Earth, but for our scale very far“. The expert also explained that “the grace is that it is very large, much larger than other comets that we know.”
Study reveals that comet discovered in Chile is the largest ever discovered
written by Alexandra Hartman Editor-in-Chief
Written in NATIONAL the 15/4/2022 · 16:00 hs
Various studies carried out in Chile determined that comet C/2014 UN271 (or simply comet Bernardinelli-Bernstein) is the largest ever discovered.
The analyses, which were published in Astrophysical Journal Letters, They reflected that it has a nucleus of regarding 135 kilometers and 50 times larger than the comments seen before. In addition, its mass was found to be regarding 500 billion tons, which means that it is 100 thousand times greater than the mass of comets close to the sun.
Along the same lines, the studies, carried out by NASA, They announced that it travels in the direction of Earth, but will never approach our planet or the Sun.
Let us remember that this comet was discovered in 2014, by Chilean astronomers Pedro Bernardinelli and Gary Bernstein at the Cerro Tololo Inter-American Observatory in our country.
University of California Los Angeles (UCLA) planetary science and astronomy scholar and co-author of the research, David Jewittnoted that “this comet is literally the tip of the iceberg of many thousands of comets that are too faint to see in the most distant parts of the Solar System”.
“We’ve always suspected that this comet had to be big, because it’s so bright at such a great distance. Now we confirm that it is”, added the expert.
To carry out the study, Hubble telescope technology was used to obtain images of the object and also radio observations.
Where is the comet now? At 3 billion kilometers from the Sun. Then, as detailed in the investigation, it must return to its nesting place (Oort cloud).