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Betty Louise Turtle (née Webster [also Webster in published works]) (20 May 1941 - 29 September 1990) was an Australian astronomer and physicist.In 1971, with her colleague Paul Murdin, she identified the powerful X-ray source Cygnus X-1 as the first clear candidate for a black hole.
The redshift of J0529-4351 is 3.962. The object itself is classified as a radio-quiet quasar.Fitting accretion models to the spectra yields an accretion rate of matter onto the black hole of 280 to 490 solar masses per year for an accretion disk around the black hole observed at an angle of zero to 60 degrees, with accretion occurring near the Eddington limit.
SMSS J215728.21-360215.1, commonly known as J2157-3602, is one of the fastest growing black holes and one of the most powerful quasars known to exist as of 2021.The quasar is located at redshift 4.75, [1] corresponding to a comoving distance of 2.5 × 10 10 ly from Earth and to a light-travel distance of 1.25 × 10 10 ly.
Yondu Udonta, or simply Yondu (/ ˈ j ɒ n d uː /), is a character appearing in American comic books published by Marvel Comics.The original version of the character is depicted as the last survivor of his species, a spiritual warrior who can control his arrows through sound waves, and a founding member of the original Guardians of the Galaxy from the 31st century of the alternate reality of ...
Arthur Reginald Evans, DSC (14 May 1905 – 31 January 1989) was an Australian coastwatcher in the Pacific Ocean theatre in World War II.He is chiefly remembered for having played a significant part in the rescue of future US President John F. Kennedy and his surviving crew after their motor torpedo boat, PT-109, was sunk by the Japanese in August 1943.
Scientists have discovered the oldest black hole yet, a cosmic beast formed a mere 470 million years after the Big Bang. The findings, published Monday, confirm what until now were theories that ...
IGR J17091 is a stellar mass black hole with a mass between 3 and 10 M ☉. It is a binary system in which a star orbits the black hole. [4] Its small size may make it a candidate for the smallest black hole discovered. [5] However, as of 2017 its mass was described as "unknown". [6]
The discovery is also described as challenging theories of black hole formation, by having a supermassive black hole much larger than expected at such an early stage in the Universe's history, [6] though this is not the first distant quasar to offer such a challenge.