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An asteroid is named after Freddie Mercury

17473 Freddiemercury, provisional designation 1991 FM3, is a stony Massalian asteroid from the inner regions asteroid belt, approximately 3.4 kilometers in diameter. The asteroid was discovered by Belgian astronomer Henri Debehogne at ESO's La Silla Observatory in northern Chile, and later named in memory of Freddie Mercury.

Evidence provides for black hole theory

An orbiting observatory has recorded an immense flare at the heart of the Milky Way galaxy, providing what scientists say is the strongest evidence yet that a black hole with millions of times the mass of the Sun lurks there.

The Space Shuttle Discovery lands after its maiden voyage

Space Shuttle Discovery is one of the orbiters from NASA's Space Shuttle program and the third of five fully operational orbiters to be built. Its first mission, STS-41-D, flew from August to September 1984. Over 27 years of service it launched and landed 39 times, gathering more spaceflights than any other spacecraft to date.

Voyager 1 probe is launched

The probe's objectives included flybys of Jupiter, Saturn, and Saturn's largest moon, Titan. In 1980, Voyager 1 became the third of five artificial objects to achieve the escape velocity that will allow them to leave the Solar System. In 2012, Voyager 1 became the first spacecraft to enter the interstellar space.

English biochemist Richard J. Roberts is born

Roberts is one of the two co-discoverers of introns in genes. The other one is Phillip Allen Sharp. Intron is a part of DNA sequence, which is removed during a process called splicing. The remaining sequences, called exons, are then joined together. They can be joined in different order. Same gene can be thus used for production of several different proteins.

Japanese biologist Susumu Tonegawa is born

He discovered the genetic principle for generation of antibody diversity in the body. Antibodies are produced by a special kind of white blood cells which are called B lymphocytes. Tonegawa found through a series of experiments, how parts of the genome of the cell are reordered to produce seemingly endless number of different antibodies.

Austrian physicist Ludwig Boltzmann dies

He invented the statistical mechanics, independently of Willard Gibbs. Their theories explain and predict how the properties of atoms determine the physical properties of matter. Boltzmann also worked on the Stefan-Boltzmann law concerning a relationship between the temperature of a body and the radiation it emits.

Great Zimbabwe city is discovered

The discovery was made by German geologist Karl Mauch (some sources say that he arrived two days earlier). Great Zimbabwe used to be a capital of the Kingdom of Zimbabwe during the country's Late Iron Age. Mauch was the first European to investigate the ruins, but centuries earlier João de Barros had written what he had heard about them.

Anniversaries of famous