In 1867, French astronomer Pierre Janssen and British astronomer William Huggins used spectroscopes to examine the atmosphere of Mars.

In 1867, English astronomer Richard A. Proctor created a more detailed map of Mars based on the 1864 drawings of English astronomer William R. Dawes.

Alexis Bouvard (27 June 1767 7 June 1843) was a French astronomer.

Julius Bauschinger (January 28, 1860 January 21, 1934) was a German astronomer.

Johann Franz Encke (23 September 1791 26 August 1865) was a German astronomer.

William Herschel was the first astronomer to attempt to determine the distribution of stars in the sky.

Carl Keenan Seyfert (February 11, 1911, Cleveland, Ohio June 13, 1960, Nashville, Tennessee) was an American astronomer.

Carl Ernst Albrecht Hartwig (14 January 1851 in Frankfurt 3 May 1923 in Bamberg) was a German astronomer.

Born in London, Parsons was the youngest son of the famous astronomer William Parsons, 3rd Earl of Rosse.

Using these laws, he was the first astronomer to successfully predict a transit of Venus (for the year 1631).

On May 22nd, there was a hero's reburial in Frombork, Poland of the 16th century astronomer who actually changed the world.

Scott Sander Sheppard is an astronomer in the Department of Terrestrial Magnetism at the Carnegie Institution for Science in Washington, DC.

Sir Joseph Norman Lockyer, FRS (17 May 1836 16 August 1920), known simply as Norman Lockyer, was an English scientist and astronomer.

It was one of the 48 constellations listed by the 2nd century astronomer Ptolemy, and remains one of the 88 modern constellations.

My talk will be in two parts. I'll talk first as an astronomer, and then as a worried member of the human race.

George Willis Ritchey (December 31, 1864 November 4, 1945) was an American optician and telescope maker and astronomer born at Tuppers Plains, Ohio.

Wilhelm Heinrich Walter Baade (March 24, 1893 June 25, 1960) was a German astronomer who worked in the USA from 1931 to 1959.

Liisi Oterma () (6 January 1915 4 April 2001) was a Finnish astronomer, the first woman to get a Ph.D. degree in astronomy in Finland.

Between 1906 and 1911 he was the Royal Astronomer of Ireland and professor of astronomy at Trinity College Dublin where he taught mathematical physics.

Because they thought that if you are having a telescope, you are an astronomer so what you are doing is actually looking in a telescope.

Led by a literary scholar and an astronomer, this new residential college aims to break down interdisciplinary boundaries and enable students to learn from one another.

But the record s predominant feature is the recurrence of solar radiation cycles lasting about 11 years (called Schwabe cycles, after the astronomer who discovered them in 1843).

Carl Edward Sagan ( November 9, 1934 December 20, 1996) was an American astronomer, cosmologist, astrophysicist, astrobiologist, author, science popularizer, and science communicator in astronomy and other natural sciences.

While young he read widely on the subject of astrology, and soon was very knowledgeable about it this extensive knowledge of astrology led to his first appointment as an astronomer.

However, the opposition was stronger it included Prime Minister H. H. Asquith, Christie (the Astronomer Royal), George Darwin, Napier Shaw (director of the Meteorological Office), many agricultural organizations, and theater owners.

Ālenush Teriān (November 9, 1920 March 4, 2011) (Persian آلینوش طریان also آلینوش تریان Armenian Ալենուշ Տէրեան ), was an Iranian astronomer and physicist and is called 'Mother of Modern Iranian Astronomy'.

In 46 BC, Julius Caesar instigated calendar reform and adopted what's now known as the Julian calendar based upon the 365 day year length originally proposed by 4th century BC Greek astronomer Callippus.

The transit of Venus was first observed in 1032 by the Persian astronomer Avicenna, who concluded Venus is closer to Earth than the Sun, and established Venus was, at least sometimes, below the Sun.

In 1934, Adams and American astronomer Theodore Dunham, Jr. found that the amount of oxygen in the atmosphere of Mars was less than one percent of the amount over a comparable area on Earth.

(born January 19, 1933) is a Jesuit priest, astronomer, and former director of the Vatican Observatory and head of the observatory s research group which is based at the University of Arizona in Tucson, Arizona.

Also, a Greek astronomer, Andronicus of Cyrrhus, supervised the construction of his Horologion, known today as the Tower of the Winds, in the Athens marketplace (or agora) in the first half of the 1st century BCE.

Brian Geoffrey Marsden (5 August 1937 18 November 2010) was a British astronomer and the longtime director of the Minor Planet Center (MPC) at the Harvard Smithsonian Center for Astrophysics (director emeritus from 2006 to 2010).

His most notable contribution was to note that in the stellar magnitude system introduced by the Greek astronomer Hipparchus, stars of the first magnitude were a hundred times as bright as stars of the sixth magnitude.

It was not until 1891 that the American astronomer, Seth Carlo Chandler, made measurements showing that there was a periodic motion of 14 months in the Earth s wobble and suggesting that this was the polhode motion.

The original Arabic version (written c. 820) is lost, but a version by the Spanish astronomer Maslamah Ibn Ahmad al Majriti (c. 1000) has survived in a Latin translation, presumably by Adelard of Bath (January 26, 1126).

The Chinese astronomer Gan De divides the celestial sphere into 365¼ degrees, and the tropical year into 365¼ days at a time when most astronomers used the Babylon division of the celestial sphere as 360 degrees (Deng, Yinke.

Speaking as both an astronomer and a concerned member of the human race, Sir Martin Rees examines our planet and its future from a cosmic perspective. He urges action to prevent dark consequences from our scientific and technological development.

An early pioneer of radio astronomy was Grote Reber, an amateur astronomer who constructed the first purpose built radio telescope in the late 1930s to follow up on the discovery of radio wavelength emissions from space by Karl Jansky.

In 1894, American astronomer William W. Campbell found that the spectrum of Mars was identical to the spectrum of the Moon, throwing doubt on the burgeoning theory that the atmosphere of Mars is similar to that of the Earth.

In 1926, by measuring spectral lines that were redshifted by the orbital motions of Mars and Earth, American astronomer Walter Sydney Adams was able to directly measure the amount of oxygen and water vapor in the atmosphere of Mars.

In 1948, the astronomer Fred Hoyle said, Once a photograph of the Earth, taken from outside, is available once the sheer isolation of the earth becomes plain a new idea as powerful as any in history will be let loose.

In 1948, the astronomer Fred Hoyle said, Once a photograph of the Earth, taken from outside, is available once the sheer isolation of the earth becomes plain a new idea as powerful as any in history will be let loose.

I always tell the students that we could also call neuroscientists some sort of astronomer, because we are dealing with a system that is only comparable in terms of number of cells to the number of galaxies that we have in the universe.

The astronomer Carl Sagan suggested that the Voyager space probe capture an image of earth as it reached the outer reaches of our solar system. It did so, in 1990, and Earth shows up in a grainy image as a pale blue dot.

(p. x) Gary Ferngren, (2002) Introduction, p. ix) ref The astronomer Carl Sagan, mentioned the dispute between the astronomical systems of Ptolemy (who thought that the sun and planets revolved around the earth) and Copernicus (who thought the earth and planets revolved around the sun).