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On February 14, 1990, Voyager 1 shot the very first picture of the entire Solar System. It entered intersteller space, like Pioneer 10. This picture, often known as the "Family Portrait," shows the Sun and six planets revolving around it, Mercury and Mars were hidden behind our star. This photo was actually put together from 60 separate frames taken and transmitted to NASA by Voyager 1.
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On April 24, 1990, the Hubble Space Telescope was released into orbit, carried into space by the space shuttle Atlantis. The Hubble Space Telescope is still the biggest, most functional, and most accomplished telescope up there. The pictures is has captured have spectacularly high resolution. Ever since Hubble has been in orbit, knowledge about space and our solar system has increased like never before. Some of its famous pictures include galaxies and nebulae. Not only are these photos important to the study of astronomy but they are also beautiful.
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On October 6, 1990, ESA(European Space Agency) and NASA worked together to launch Ulysses. This spacecraft's mission was to fly by Jupiter, then become the first probe to ever explore the regions over and beneath the northern and southern poles of the Sun. To do this, Ulysses, had to enter the heliosphere, an area in space affected by the Sun's magnetic field. It orbited the Sun three times, in a strange yet special "polar orbit." It's mission allowed scientists to study the Sun like there was no tomorrow. They were even able to map large chunks of the heliosphere, a region that was barely known at the time.
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On October 21, 1991, Galileo became the first spacecraft to flyby an asteroid. This asteroid was 951-Gaspra. Later, it became the first to discover an asteroid moon. This moon was Dactyl, orbiting the asteroid, 243 Ida. Galileo sent back many pictures of these asteroids and moons back to NASA. This was a great success because during the time, the probe was under serious antenna problems.
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On December 7, 1995, Galileo became the first space probe to orbit Jupiter, and its landing device became the first to penetrate a gas giant's atmosphere. Jupiter's atmosphere and ammonia clouds were recorded. Volcanoes on the surface of Io(moon) were also recorded. Studies with other moons, Ganymede, Callisto, and Europa, led scientists to believe these satellites have magnetic fields and exospheres surrounding them. Galileo also discovered that Jupiter had thin rings around it. Part of Jupiter's magnetosphere was mapped as well.