who discovered Mercury?
476714
Mercury has been observed for thousands of years, and the Babylonians are credited with mentioning it in writing for the first time some 3000 years ago.\n\n* Johann Hieronymus Schroeter was the first to observe the planet Mercury and record detailed drawings of Mercury's surface features. Schroeter lived from 1745 to 1816. Unfortunately, his sketches were not very accurate. \n\n* Streaks similar to the so-called "Martian Canals" were also seen on Mercury by Schiaparellit and Percival Lowell (1855-1916). \n\n* An astronomer by the name of Eugenios Antoniadi (1870-1944) charted the surface of Mercury in great detail. His maps were used for almost 50 years. He used one of the stronger telescopes of his time and found the canals to be optical illusions. \n\n* Mariner 10 provided a close look at Mercury which redrew earlier telescope charts and maps.
617590
Carl Wilhelm Scheele discovered it in 1772, and Joseph Priestly found it in 1774 (independently).  Scheele was a Swede, Priestly was an Englishman.
100270
William Herschel discovered Neptune in 1781 according to "Foundations of Astronomy" by Michael Seeds. That was the Astronomy textbook I used for a college class in 1999 or 2000 or so.\n\nNeptune had been seen with telescopes much earlier than that date but according to my sources it was erronously considered as a star. Further researching would include Hipparchus "Alghemest", Ptolemly, and Coprenicus to be sure that is the case.
294195
The first step was to use Kepler's laws to get relative distances between the planets and the sun. So, it was known that mercury orbited at a distance of 40% of the earth's before the actual distances were known.\n\nAfter that, the actual distance to *one* object orbiting the sun was enough to give all the distances. Historically, that was done by paralax with asteroids that came close to the earth. Today it is done by bouncing radio beams off of other planets such as Venus and measuring the time it takes for the reflected beam to get back to us. Various probes also give a distance calibration.
1186752
http://en.wikipedia.org/wiki/Discovery_of_america\nPlease click the above link to know in detail.
875292
Hubble discovered expansion...sort of. He proposed it as a theory but it was a colleague who did the math and proved it. I can't remember the colleague's name.
1069307
that question ranks with who discovered u can get milk from cows and what they were doing at the time lol
1717
Benjamin Franklin but a lot of scientists contributed in the discovery. It all started 600 BC with the greeks followed by Dr William Gilbert,Benjamin Franklin,Galvani and Volta,Michael Faraday,Thomas Edison and Joseph Swan,George Westinghouse and Nikola Tesla,James Watt and finally Andre Ampere and George Ohm
463143
In 1869 when the periodic table first was created by Mendeleev.  The element was first isolated in 1774.
702141
Discovered by: Sir Humphrey Davy, Joseph-Louis Gay-Lussac, L.J. Th&„nard \n\nDiscovered at: England, France \n\nBoron compounds have been known for thousands of years, but the element was not isolated until 1808 by Sir Humphry Davy, Joseph-Louis Gay-Lussac (1778-1850) and Louis Jaques Thénard (1777-1857). This was accomplished through the reaction of boric acid (H3BO3) with potassium.
517398
Magnesium and trace amonts of mercury.
330206
In the last few years of the 18 cetury (I estimate between 1793-1799) Baron Franz Xaver von Zach ordered a group of 24 astronomers to find a "missing planet" (the planet we know now as neptune) to solve the mystery of uranus's strange rotation.  However, the first asteroid discovered, 1 ceres, was discovered by accident by Giuseppe Piazzi.  Later, there were several other found.  The ammount keep going on through today!
1054397
Titan, the largest moon of Saturn, and after Ganymede, the second-largest moon in the Solar System. Discovered by Christiaan Huygens, a Dutch astronomer on March 25th, 1655 about 45 years later than Galielo's discovery of 7th January 1610.\n\nTwo generations later suggests to me that the church did inhibit research. Telescopes existed, and the thought that if Jupiter had moons, then Saturn might have them, too, must have occurred to the astronomers of the day, Perhaps it inhibited publication more than research? Another factor to consider is that Holland was also less under the sway of Roman Catholicism than Italy had been for Galileo.\n\nHuygens named his discovery simply Saturni Luna (Latin for "Saturn's moon", which can also be written Luna Saturni) (De Saturni Luna observatio nova, 1656; XV). Later, Giovanni Domenico Cassini named the four moons he discovered (Tethys, Dione, Rhea and Iapetus) Lodoicea Sidera ("the stars of Louis") to honour king Louis XIV.\n\nThe name "Titan" and the names of all seven satellites of Saturn then known come from John Herschel (son of William Herschel, discoverer of Mimas and Enceladus) in his 1847 publication Results of Astronomical Observations made at the Cape of Good Hope, wherein he suggested the names of the Titans, sisters and brothers of Cronos (the Greek Saturn), be used.\n\nJupiter was the Roman equivalent of the Greek Zeus, and Saturn the Roman equivalent of Zeus' father, Cronos (Zeus' mother was Rhea, the name given to another of Saturn's moons).\n\nThe Huygens spacecraft and Cassini probe that explored Titan in 2004 were named after these two astronomers.
160712
Oxygen was first discovered by Michał Sędziwój, Polish alchemist and philosopher in late 16th century. Sędziwój assumed the existence of oxygen by warming nitre (saltpeter). He thought of the gas given off as "the elixir of life".\n\nOxygen was again discovered by the Swedish pharmacist Carl Wilhelm Scheele sometime before 1773, but the discovery was not published until after the independent discovery by Joseph Priestley on August 1, 1774, who called the gas dephlogisticated air (see phlogiston theory). Priestley published his discoveries in 1775 and Scheele in 1777; consequently Priestley is usually given the credit. It was named by Antoine Laurent Lavoisier after Priestley's publication in 1775.
720946
On March 13, 1781 he discovered the planet Uranus.
1135906
William Hyde Wollaston discovered palladium in 1803-4 in crude platinum ore from South America.
446696
Mercury, Venus, Mars, Jupiter, and Saturn were all known in ancient times.  They are named after Roman mythological figures (other societies had different names for them, but the Roman names are what we use in the West).  Uranus (1700s), Neptune (1800s), and Pluto (1930) were discovered after the invention of the telescope, but the tradition of Roman Gods was continued by the discoverers.  The only discoverer's name I can remember is the famous astronomer William Herschel, who discovered Uranus.  I'm sure you can find out the names of Neptune's and Pluto's discoverers with a Google search.