astrophysics

Astronomer James Jeans

Astronomer James Jeans

On September 11, 1877, English physicist, astronomer and mathematician James Hopwood Jeans was born. Jeans was the first to propose that matter is continuously created throughout the universe. He made other innovations in astronomical theory but is perhaps best known as a writer of popular books about astronomy. James Jeans was attended several schools, he joined Merchant Taylors’ School, Northwood, Wilson’s Grammar School, as well as Camberwell and Trinity College, Cambridge.  At…
Victor Ambartsumian and Theoretical Astrophysics

Victor Ambartsumian and Theoretical Astrophysics

On September 5, 1908, Soviet astronomer and astrophysicist Viktor Amazaspovich Ambartsumian was born. Ambartsumian is well known as one of the founders of theoretical astrophysics. He worked in the field of physics of stars and nebulae, stellar astronomy, dynamics of stellar systems and cosmogony of stars and galaxies, and contributed to mathematical physics. Victor Ambartsumian was the son of the prominent philologist and writer Hamazasp Asaturovich Ambartsumian, the translator of Homer’s Iliad…
Iosif Shklovsky and Intelligent Life in the Universe

Iosif Shklovsky and Intelligent Life in the Universe

On July 1, 1916, Soviet astronomer and astrophysicist Iosif Shklovsky was born. Shklovsky identified the continuum radiation of the Crab Nebula as synchrotron radiation, and he linked x-ray stars to binary systems containing a neutron star. He is also remembered for his 1962 book on extraterrestrial life, the revised and expanded version of which was co-authored by American astronomer Carl Sagan in 1966 as ‘Intelligent Life in the Universe’. Iosif Shklovsky…
The first Observation of Gravitational Waves

The first Observation of Gravitational Waves

On September 14, 2015, the LIGO Scientific Collaboration observed gravitational waves from a 410 megaparsec (1.3 billion light years) distant merger of two black holes. Previously, gravitational waves had only been inferred only indirectly, via their effect on the timing of pulsars in binary star systems. It was also the first observation of a binary black hole merger, demonstrating both the existence of binary stellar-mass black hole systens, and the…
Jerry R. Ehman and the Wow! Signal

Jerry R. Ehman and the Wow! Signal

On August 15, 1977, a strong narrowband radio signal was received by the Big Ear radio telescope of the Ohio State University, United States, then assigned to a SETI project. Astronomer Jerry R. Ehman discovered the signal a few days later, while reviewing the recorded data and was so impressed that he circled the reading on the computer printout and wrote the comment Wow! on its side. Jerry R. Ehman…
Frank Drake and Project Ozma

Frank Drake and Project Ozma

On May 28, 1930, American astronomer and astrophysicist Frank Drake was born. He is most notable as one of the pioneers in the search for extraterrestrial intelligence, including the founding of SETI, mounting the first observational attempts at detecting extraterrestrial communications in 1960 in Project Ozma, developing the Drake equation, and as the creator of the Arecibo Message, a digital encoding of an astronomical and biological description of the Earth…
Cecilia Payne-Gaposchkin and the Composition of Stars

Cecilia Payne-Gaposchkin and the Composition of Stars

On May 10, 1900, British–American astronomer and astrophysicist Cecilia Helena Payne-Gaposchkin was born. She was the first to apply laws of atomic physics to the study of the temperature and density of stellar bodies, and the first to conclude that hydrogen and helium are the two most common elements in the universe. It was another 20 years before Payne’s original claim was confirmed, by Fred Hoyle. Cecilia Payne-Gaposchkin earned a…
Carl Sagan’s Cosmos

Carl Sagan’s Cosmos

Carl Saganwith a model of the Viking lander Image: NASA On November 9, 1934, American astronomer, astrophysicist, cosmologist, and successful author Carl Sagan was born. Carl Sagan is known for his popular science books and for the award-winning 1980 television series Cosmos: A Personal Voyage, which he narrated and co-wrote. Carl Sagan grew up in Brooklyn, New York and received his education in mainly public schools. Even though his parents…
Subrahmanyan Chandrasekhar and the Evolution of Stars

Subrahmanyan Chandrasekhar and the Evolution of Stars

Subrahmanyan Chandrasekhar (1910-1995) On October 19, 1910, Indian-American astrophysicist and Nobel Laureate Subrahmanyan Chandrasekhar was born. He won the 1983 Nobel Prize for Physics together with William Alfred Fowler for key discoveries that led to the currently accepted theory on the later evolutionary stages of massive stars. If you are a frequent reader of this blog, you might have encountered articles about scientists, artists, or explorers you might have never…
David Fabricius and the Wonders of the Heavens

David Fabricius and the Wonders of the Heavens

Ultraviolet image of the star Mira showing its comet-like trail of gas over 13 light-years longImage: NASA On August 13, 1596, German theologian and astronomer David Fabricius discovered the first known periodic variable star, which he called Mira Ceti (The ‘Wonder’ in the stellar constellation ‘Whale’). David Fabricius was born in Esens, Lower Saxony and received a pretty good education, learning mostly Latin. In Braunschweig, he first gained a few…
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