![]() ![]() ![]() But in light of the discoveries made by the Cassini, Dawn, and New Horizons spacecraft, scientists have been revisiting the data collected by Voyager in addition to the data obtained by ground-based telescopes. The Voyager spacecraft flew by Uranus a long time ago, in 1985. This app works best with JavaScript enabled. 3D gravity simulations of the solar system and its planets, moons, asteroids and comets powered by data from NASA. The space agency has only ever flown one spacecraft, Voyager 2, by the seventh planet in our Solar System. Explore the schorched surface of Mercury and the icy plains of Pluto. Besides being known for its funny name and its brilliant cyan shade, Uranus has at least 27 moons. Now, NASA may need to add the moons of Uranus to its exploration hit list. And just last month, the European Space Agency launched a spacecraft, Juice, to explore several icy moons at Jupiter. ![]() Another mission may launch to Saturn's moon Titan a few years later, where there are oceans of liquid methane on the surface. In response to these discoveries, NASA is planning to launch a mission to Europa, an ice-encrusted moon in the Jovian system, as early as 2024. This was exciting because where there is water in its liquid state, there is the possibility of life. But the most consistently interesting discovery made by these probes was that Jupiter and Saturn are surrounded by small and large moons covered in ice, possessing large water oceans below, or both. The spacecraft investigated all manner of intriguing moons, from little radiation-saturated hellholes to a world covered in volcanoes. The selvage is a montage of Saturn and several of its moons imaged by Voyager I in November 1980, courtesy of NASA.In recent decades, NASA has sent large spacecraft-Galileo and Cassini, respectively-to fly around Jupiter and Saturn to explore the dozens of moons that exist in those planetary systems. They depict (clockwise from the top) an image of a solar eclipse from a satellite by Dan McCoy an illustrated cutaway view of the sun by artist Jim Lamb a digitally restored NASA image of sunrise from space, courtesy of Stock Solution an image made by Skylab on December 19, 1973, of a solar eruption, courtesy of Solar Physics Group/Naval Research Laboratory and a photograph from Earth of the sun in a partly cloudy sky by Craig Aurness, courtesy of Corbiss. These five stamps represent the exploration of our solar system and are the first pentagonal stamps ever issued by the U.S. These stamps, designed by Richard Sheaff of Scottsdale, Arizona, are based on different images of the Earth's sun, as described below. The Postal Service issued an Exploring the Solar System souvenir sheet featuring five 1-dollar commemorative stamps in Anaheim, California, on July 11, 2000. $1 Exploring the Solar System sheet of five Solar Sails and Micro-Satellites Might Be the Future of Space Exploration Bouncing light off of big sheets of metal might power the next phase of Solar System discovery. 1 Exploring the Solar System Issue Date: JCity: Anaheim, CA Quantity: 1,695,000 Printed by: American Packaging Corporation for Sennett Security Products Printing Method: Photogravure Perforations: 10. Jill Piazza and Daniel Piazza, National Postal Museum Reference: Postal Bulletin (June 1, 2000) In the selvage is a digitally enhanced image from the Hubble Space Telescope depicting the gaseous pillars in the stellar nursery known as the Eagle Nebula, courtesy of the Space Telescope Science Institute. The 302-meter radio telescope at the National Science Foundation's Arecibo Observatory in Puerto Rico is from a photograph by David Parker. The 100-inch Hooker Optical Telescope from Mount Wilson Observatory, near Pasadena, CA, is from a photograph by John Bedke, courtesy of Huntington Library. The optical telescopes from the National Science Foundation's Cerro Tololo Inter- American Observatory, east of La Serena, Chile, are from a photograph by Roger H. Keck Observatory on Manua Kea, HI, is from a photograph by David Nunuk. The image of the twin 10-meter optical and infrared telescopes at W.M. The radio interferometer is a photograph by David Nunuk depicting the National Science Foundation's very large array on the plains of San Agustin, west of Socorro, NM. The 2.4-meter optical telescope is a conceptual drawing of NASA's Hubble Space Telescope by artist Vincent Di Fate. These six stamps were issued in international rate denominations and address the exploration of deep space. The stamps, designed by Richard Sheaff of Scottsdale, Arizona, are based on photographs described below. The Postal Service issued a souvenir sheet featuring six individual 60-cent Probing the Vastness of Space commemorative stamps in Anaheim, California, on July 10, 2000. 60-cent Probing the Vastness of Space sheet of six ![]()
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