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Home › Science › Astronomy › Astronomers › H

H

George Ellery Hale (1868-1938)

  • Born in USA.
  • He was the first to recognize the importance of the magnetic fields of sunspots.
  • He invented the spectoheliograph.
  • He was responsible for having the largest reflector telescopes in the US set up.

Edmund Halley (1656-1742)

  • Born in England.
  • He drew the first good star map of the southern stars.
  • He completed a study of the movements of the Moon.
  • He probably is best known for his work on comets, one of which is named after him.

William Herschel (1738-1822)

  • Born in Germany.
  • He discovered the planet Uranus.
  • He was the first to work out the shape of a galaxy.
  • He established that double stars are binaries.
  • He discovered star clusters and nebulae and made observations on the planets.

Ejmar Hertzsburg (1873-1967)

  • Born in Denmark.
  • He found that red stars are either giants or dwarves, but not in-between.
  • He drew a diagram (H-R) according to the luminosity and colour of stars.
  • He devised a method of estimating stellar distances by examination of the spectra of the stars.

Johannes Hevelius (1611-1687)

  • Born in Poland.
  • He built quadrants, sundials, and telescopes.
  • He produced the best lunar map of his day.





Jeremiah Horrocks (1619-1642)

  • Born in England.
  • He correctly predicted that Mercury and Venus would transit across the face of the sun in 1631.

Edwin Powell Hubble (1889-1953)

  • Born in USA.
  • He proved that the starry nebulae are independent galaxies.
  • He divided galaxies into classes according to their shapes.
  • He found that there is a link between the distance of a galaxy and the speed in which it is moving away.

William Huggins (1824-1910)

  • Born in England.
  • With the aid of a spectroscope on his telescope, he found dark lines on the spectra of Betelgeuse and Aldebaran and other stars. Thus, he determined that Sirius is moving away by noting red-shifting.
  • He showed that the nebulae are gaseous and that the planets shine by reflecting light from the Sun.
  • He also obtained photographic stellar spectra.

Christiaan Huygens (1629-1695)

  • Born in Holland.
  • He discovered what the rings of Saturn are.
  • He also discovered Titan, one of Saturn’s satellites.
  • He made the first drawing of Mars that showed the surface detail.
  • Numerous lenses and clocks were made by him.
  • His main contribution to science was his belief that light is a wave motion.




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