Large sunspots were occasionally seen far in the past without any instruments, when the sun was dimmed by thick haze, but not much was remembered of those observations. ... Sunspot Cycle (1850 - 1975) . One who was greatly influenced by Schwabe's discovery was an English gentleman of independent means, Richard Christopher Carrington , who devoted himself to the study of sunspots. ... Carrington had seen a flare, of the rare variety that is visible in white light (only about 50 are known). ...

... What drives the selection of the next mission: science drivers or technical capability? ... Giga- missions ( + $1B) should start with the question (TPF) NASA needs both kinds Examples: Copernicus FUSE · (coatings, detectors ) · local astronomy galactic astronomy · next generation extragalactic FUV IUE GHRS STIS COS COBE MAP Generic UV - 0ptical Technology Drivers Optics: · · · · · size with high figure quality size w/o high figure quality ultra-low scatter efficient wide field designs better...

Astronomy Picture of the Day . Edmund Halley's Greatest Discoveries . ... 6.07.1996 . ... Born in 1656, he computed in 1705 that a bright comet was periodic and would make another appearance in 1758. The comet appeared as predicted and is now known as Comet Halley . ... Perhaps Halley's greatest discovery, however, was that his contemporary Isaac Newton had discovered a powerful mathematical formulation of gravity. ... July 1996 . ... NASA Web Site Statements, Warnings, and Disclaimers . ...

... July 6, 1996 . Edmond Halley's Greatest Discoveries . Explanation: Sir Edmond Halley was quite a discoverer. Born in 1656, he computed in 1705 that a bright comet was periodic and would make another appearance in 1758. The comet appeared as predicted and is now known as Comet Halley . ... Perhaps Halley's greatest discovery, however, was that his contemporary Isaac Newton had discovered a powerful mathematical formulation of gravity. ... About APOD | ...

... Jupiter's big moon Ganymede is not only the size of a planet -- it sounds like one too, as heard in audio recordings made from data returned by NASA's Galileo spacecraft released today. ... Characterized by a soaring whistle and hissing static, Ganymede's song reveals that the Solar System's largest moon is also the only one known to possess a planet-like, self-generated magnetic cocoon called a magnetosphere , which shields the moon from the magnetic influence of its giant parent body, Jupiter. ...

Physicists have been honored by having their picture on currency in many countries around the world. ... Marie and Pierre Curie (Marie: 1867-1934, Pierre: 1859-1906) appear on the French 500 franc note. ... The greatest physicist of this century, Einstein not only invented the theories of special relativity (behavior of rapidly moving object) and general relativity (theory of gravitation), but made fundamental contributions to the beginnings of quantum theory. ... For a bio, click here . ... 100 K) . ...

Astronotes Armagh Planetarium's Stellar Blog! ... Space Flight . ... December . ... By admin December 9, 2012 Posted in: Armagh Planetarium . Patrick Alfred Caldwell-Moore was born in 1923 and began his life-long interest in astronomy from a very early age. ... Demonstrating a good-natured wit, Moore impressed both viewers and programme makers. ... In 1965 Patrick Moore was invited to Northern Ireland to be the first director of Armagh Planetarium which was already under construction. ...

... Tonight's Sky . ... Observing . ... Trips Tours . ... Subscriber Extras . ... Web Extras . ... 50 Greatest Mysteries . ... Web Extra: A tour around the Great Rift . ... In the July 2015 issue of Astronomy , author Alan Goldstein described the many dark nebula that lie along a section of the Milky Way called the Great Rift. ... Get instant access to subscriber content on Astronomy.com! ... Receive news, sky-event information, observing tips, and more from Astronomy's weekly email newsletter. ...

. 16th of August 2015 . Lego ASKAP antennas . A great find in the Gravity Discovery Centre at Gingin Observatory in Western Australia (WA). This was just one of many great displays and interactive science experiments. Further north in WA the real Australian SKA Pathfinder (ASKAP) - 36 x 12-m antennas - is being equipped with wide-field Phased-Array Feeds. RSS feed generated by Page2RSS . | archive | about | today * ATNF | Parkes | ATCA | Mopra | VLBI | ASKAP | .

The black hole. ... The black holes are generated in the result of a collapse of giant stars with the mass more than three Sun's masses. ... And moreover the gas near the neutron star or the black hole will get hot and will become a source of high energetic electromagnetic radiation in X-rays and gamma range. ... In the majority of double systems, being the sources of X-rays radiation, the invisible component mass does not exceed the two solar masses, so it is a neutron star. ...

An Ancient Universe: How Astronomers Know the Vast Scale of Cosmic Time . THE CHANGING UNIVERSE: EVOLUTION HAPPENS! . b) Changes in Stars . One of the great discoveries of modern science is that stars (like people) live only a measurable life-time and then die. Although the lives of the stars are enormously longer than the span of a human life, we can learn about the life story of the stars by studying them at many different stages in their life cycle, from birth to death. ...