The superheated materials emit X-rays, which can be detected by X-ray telescopes such as the orbiting Chandra X-ray Observatory. The star Cygnus X-1 is a strong X-ray source and is considered to be a good candidate for a black hole. Stellar winds from the companion star, HDE 226868, ...
The superheated materials emit X-rays, which can be detected by X-ray telescopes such as the orbiting Chandra X-ray Observatory. The star Cygnus X-1 is a strong X-ray source and is considered to be a good candidate for a black hole. Stellar winds from the companion star, HDE 226868, ...
The first evidence of the existence of black holes was found in the 1960s, when strong X-rays were detected from a system called Cygnus X-1. In this system, theblack holeis orbited by a massive star blowing an extremely strong wind, more than 10 million times stronger than the ...
Stellar-mass black holes are often paired with normal stars in systems known asX-ray binaries. In the past decade, X-ray observatories have helped scientists learn much about how stellar-mass black holes pull matter from their partner stars. In turn, these findings are helping astrophysicists u...
The other advantage of this method, the scientists said, is that there are fewer uncertainties created by gaps in our scientific knowledge. “By using the entire population of black holes, the method can calibrate itself, directly identifying and correcting for errors,” Holz said. Th...
Things get even more heated and energetic with X-rays. Discovered accidentally by German physicist Wilhelm Roentgen in 1895, these matter-penetrating rays are generated in vast amounts during some of the most extraordinary processes in the universe, such as when supermassive black holes or extremely...
C/2023 A3 (紫金山–ATLAS) was initially detected by the Near-Earth Object telescope in Xuyi 盱眙, Purple Mountain 紫金山 Observatory (Jiangsu, China). A few weeks later, it was ‘rediscovered’ by the Sutherland facility in the Karoo (South African Astronomical Observatory) as part of the ...
Such objects include brown dwarfs, exceedingly dim white dwarfs, neutron stars and even black holes. MACHOs probably contribute somewhat to the dark matter mystery, but there are simply not enough of them to account for all of the dark matter in a single galaxy or cluster of galaxies. ...
Light of this wavelength is invisible to humans but can be detected by black and white CCD cam- eras. The IR pulses that are emitted by the remote control can be seen as a flashing light on the video monitor. This offers some interesting possibilities. If an artificial source of IR ...
When matter falls into black holes, it tends to spiral in dense, extremely hot disks of gas first. This gas gets hot enough that it radiates in the x-ray spectrum (the hotter something is, the bluer the light it emits and x-rays are… way to blue to see). Under ...