No. The idea of a black hole was first proposed in 1783, 230 years ago. The first observations believed to indicate the presence of a black hole were in 1964.
j.l.abbott discovered the Aztecs 400 years ago
The first time an object was viewed as a black hole by most astronomers was in 1971. Prior to that, most astronomers were skeptical such an object even existed, let alone that one had been detected.
The black death disappeared from Europe about 150-400 years after it began.
400 years
State of the Black Union Jamestown - The Next 400 Years - 2007 TV was released on: USA: 19 August 2007
Nearsightedness or myopia has been known for thousands of years. It was about 400 years ago that glasses or spectacles were invented to combat this common disorder.
Almost everything that is known today by scientists, was not known 400 years ago, because it had not been discovered yet. Science was barely getting started, in 1613.
zero discovered in India in 400 BC in maharashtra
400 years
Good question - The black hole(s) (i.e. Sagittarius A*) at the center of the Milky Way are estimated to be a little more than 4 million solar masses (e.g. stars like our Sun). The Milky Way galaxy is a barred spiral galaxy 100,000-120,000 light-years in diameter and has been estimated to be hosting 200-400 billion stars, and at least as many planets. Therefore the answer is that the accumulated mass of the Milky Way galaxy (of course excluding its centric black hole(s)) is greater than the mass of the black hole(s) at the center of the Milky Way.
Black death or plague covered 400 years. 1300 to 1600.
For about 400 years.