CMS Planets Project

Significant Dates for Neptune

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Significant Dates for Neptune

Post  yan.justin98 on Fri Nov 18, 2011 4:15 pm

Significant Dates

* 1846: Using mathematical calculations, astronomers discover Neptune, increasing the number of known planets to eight. Neptune's largest moon, Triton, is found the same year.
* 1984: Astronomers find evidence for the existence of a ring system around Neptune.
* 1989: Voyager 2 becomes the first and only spacecraft to visit Neptune, passing about 4,800 km (2,983 miles) above the planet's north pole.
* 1998: Scientists using telescopes on Earth and in space image Neptune's rings and ring arcs for the first time.
* 2003: Using improved observing techniques, astronomers discover five new moons orbiting Neptune.
* 2005: Scientists using the Keck Observatory image the outer rings and find that some of the ring arcs have deteriorated.
* 2011: Neptune completes its first 165-year orbit of the sun since its discovery in 1846.
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