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Q: what do you know about Telescopic observations of our solar system ?
| Option | Answer | Is Correct |
|---|---|---|
| 1 | The first exploration of the solar system was conducted by telescope, when astronomers first began to map those objects too faint to be seen with the naked eye. Galileo Galilei was the first to discover physical details about the individual bodies of the Solar System. He discovered that the Moon was cratered, that the Sun was marked with sunspots, and that Jupiter had four satellites in orbit around it. Christian Huygens followed on from Galileo’s discoveries by discovering Saturn’s moon Titan and the shape of the rings of Saturn. Giovanni Domenico Cassini later discovered four more moons of Saturn, the Cassini division in Saturn’s rings, and the Great Red Spot of Jupiter. Edmund Halley realized in 1705 that repeated sightings of a comet were in fact recording the same object, returning regularly once every 75-6 years. This proved once and for all that comets were not atmospheric phenomena, as had been previously thought, and was the first evidence that anything other than the planets orbited the Sun. In 1781, William Herschel was looking for binary stars in the constellation of Taurus when he observed what he thought was a new comet. In fact, its orbit revealed that it was a new planet, Uranus, the first ever discovered. Giuseppe Piazzi discovered Ceres in 1801, a small woFid between Mars and Jupiter that was initially considered a new planet. However, subsequent discoveries of thousands of other small worlds in the same region led to their eventual separate reclassification: asteroids. By 1846, discrepancies in the orbit of Uranus led many to suspect a large planet must be tugging at it from farther out. Urbain Le Verrier’s calculations eventually led to the discovery of Neptune. The excess perihelion precession of Mercury’s orbit led Le Verrier to postulate the intraMercurian planet Vulcan in 1859—but that would turn out to be a red herring. Further apparent discrepancies in the orbits of the outer planets led Percival Lowell to conclude yet another pl |
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