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Illustration of the blue giant star HD 37974, in the Large Magellanic Cloud. Astronomers suspect that it is surrounded by a dusty disc, stretching for 60 times the distance of Pluto's orbit from the Sun (about 3,000 astronomical units, or AU). The disc could be a remnant from planet formation, or the beginning of the planet-creation process.Illustration of the blue giant star HD 37974, in the Large Magellanic Cloud. Astronomers suspect that it is surrounded by a dusty disc, stretching for 60 times the distance of Pluto's orbit from the Sun (about 3,000 astronomical units, or AU). The disc could be a remnant from planet formation, or the beginning of the planet-creation process.
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Hotel and the astronomic observatory at the Gornergrat, in the background the Matterhorn or Cervino mount, Zermatt, Valais, Switzerland, EuropeHotel and the astronomic observatory at the Gornergrat, in the background the Matterhorn or Cervino mount, Zermatt, Valais, Switzerland, Europe
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An amateur astronomer viewing the Milky Way in Maine.An amateur astronomer viewing the Milky Way in Maine.
Amateur astronomers gather under dark sky of a desert in Iran to attend an annual observing competition known as the Messier Marathon.Amateur astronomers gather under dark sky of a desert in Iran to attend an annual observing competition known as the Messier Marathon.
Illustration comparing the size of Earth (left) with the planet Uranus. Uranus is the seventh planet from the Sun, with an average distance from it of 19.2 times the Earth-Sun distance. A fluid world of mostly hydrogen and helium, it is rich in ices of methane, water and ammonia, causing some astronomers to label it (along with Neptune) an ice giant. With a diameter of four times that of the Earth, Uranus is the Solar System's third largest planet (after Jupiter and Saturn).Illustration comparing the size of Earth (left) with the planet Uranus. Uranus is the seventh planet from the Sun, with an average distance from it of 19.2 times the Earth-Sun distance. A fluid world of mostly hydrogen and helium, it is rich in ices of methane, water and ammonia, causing some astronomers to label it (along with Neptune) an ice giant. With a diameter of four times that of the Earth, Uranus is the Solar System's third largest planet (after Jupiter and Saturn).
Structure in astronomical park in New Delhi, IndiaStructure in astronomical park in New Delhi, India
Structure in astronomical park, New Delhi, IndiaStructure in astronomical park, New Delhi, India
March 3, 2017: Czech Republic, Central Bohemia Region, Prague, Prague Old Town Square, Astronomical Clock, Bohemia, Checy, Astronomical clockMarch 3, 2017: Czech Republic, Central Bohemia Region, Prague, Prague Old Town Square, Astronomical Clock, Bohemia, Checy, Astronomical clock
Illustration of the triple star system HD 131399, as seen from a planet. The system consists of a close binary pair of low-mass, red stars, separated by about 10 astronomical units (AU), which is in turn in orbit around a more massive, white main-sequence star at a distance of several hundred AU. Astronomers thought they detected a planet around the more massive star, HD 131399 A. However, the so-called planet, dubbed HD 131399 Ab or Scorpion-1b, is now thought to be a background star. This image imagines the supposed planet viewed from a nearby moon.Illustration of the triple star system HD 131399, as seen from a planet. The system consists of a close binary pair of low-mass, red stars, separated by about 10 astronomical units (AU), which is in turn in orbit around a more massive, white main-sequence star at a distance of several hundred AU. Astronomers thought they detected a planet around the more massive star, HD 131399 A. However, the so-called planet, dubbed HD 131399 Ab or Scorpion-1b, is now thought to be a background star. This image imagines the supposed planet viewed from a nearby moon.
Jantra Mantra astronomical park, New Delhi, IndiaJantra Mantra astronomical park, New Delhi, India
Astronomical photography- M16 eagle nebulaAstronomical photography- M16 eagle nebula
Illustration of the planet Kepler 1625b and its proposed exomoon. Kepler 1625 is a Sun-like star some 4,000 light-years distant in Cygnus. It is about 80 percent of the radius of the Sun but about 8 percent more massive. The star has at least one known planet. Called Kepler 1625b, it is a large gas giant, up to 12 times the diameter of Jupiter and orbiting within the star's habitable zone. In 2018, astronomers reported that the planet might be orbited by a satellite - an exomoon - although this remains to be confirmed. The suspected moon is Neptunian in size, orbiting its planet at a distance of 20 times the planet's radius.Illustration of the planet Kepler 1625b and its proposed exomoon. Kepler 1625 is a Sun-like star some 4,000 light-years distant in Cygnus. It is about 80 percent of the radius of the Sun but about 8 percent more massive. The star has at least one known planet. Called Kepler 1625b, it is a large gas giant, up to 12 times the diameter of Jupiter and orbiting within the star's habitable zone. In 2018, astronomers reported that the planet might be orbited by a satellite - an exomoon - although this remains to be confirmed. The suspected moon is Neptunian in size, orbiting its planet at a distance of 20 times the planet's radius.
Illustration of the planet Kepler 1625b and its proposed exomoon, transiting their star. Kepler 1625 is a Sun-like star some 4,000 light-years distant in Cygnus. It is about 80 percent of the radius of the Sun but about 8 percent more massive. The star has at least one known planet. Called Kepler 1625b, it is a large gas giant, up to 12 times the diameter of Jupiter and orbiting within the star's habitable zone. In 2018, astronomers reported that the planet might be orbited by a satellite - an exomoon - although this remains to be confirmed. The suspected moon is Neptunian in size, orbiting its planet at a distance of 20 times the planet's radius.Illustration of the planet Kepler 1625b and its proposed exomoon, transiting their star. Kepler 1625 is a Sun-like star some 4,000 light-years distant in Cygnus. It is about 80 percent of the radius of the Sun but about 8 percent more massive. The star has at least one known planet. Called Kepler 1625b, it is a large gas giant, up to 12 times the diameter of Jupiter and orbiting within the star's habitable zone. In 2018, astronomers reported that the planet might be orbited by a satellite - an exomoon - although this remains to be confirmed. The suspected moon is Neptunian in size, orbiting its planet at a distance of 20 times the planet's radius.
Illustration of the planet Kepler 1625b and its proposed exomoon. Kepler 1625 is a Sun-like star some 4,000 light-years distant in Cygnus. It is about 80 percent of the radius of the Sun but about 8 percent more massive. The star has at least one known planet. Called Kepler 1625b, it is a large gas giant, up to 12 times the diameter of Jupiter and orbiting within the star's habitable zone. In 2018, astronomers reported that the planet might be orbited by a satellite - an exomoon - although this remains to be confirmed. The suspected moon is Neptunian in size, orbiting its planet at a distance of 20 times the planet's radius.Illustration of the planet Kepler 1625b and its proposed exomoon. Kepler 1625 is a Sun-like star some 4,000 light-years distant in Cygnus. It is about 80 percent of the radius of the Sun but about 8 percent more massive. The star has at least one known planet. Called Kepler 1625b, it is a large gas giant, up to 12 times the diameter of Jupiter and orbiting within the star's habitable zone. In 2018, astronomers reported that the planet might be orbited by a satellite - an exomoon - although this remains to be confirmed. The suspected moon is Neptunian in size, orbiting its planet at a distance of 20 times the planet's radius.
SDSS 1557 is a binary star system, 1000 light-years away, consisting of a white dwarf orbiting a brown dwarf, Astronomers have found that the system is surrounded by a narrow disc or ring rich in rocky and metallic elements, which they suggest are in the process of coming together (accreting) to form new planets It's the first time evidence of rocky planet formation has been seen in a binary star systemSDSS 1557 is a binary star system, 1000 light-years away, consisting of a white dwarf orbiting a brown dwarf, Astronomers have found that the system is surrounded by a narrow disc or ring rich in rocky and metallic elements, which they suggest are in the process of coming together (accreting) to form new planets It's the first time evidence of rocky planet formation has been seen in a binary star system
Diagram showing the interior of the Sun. The solar interior is composed of a core (central 30%), a radiative zone outside this, and finally a convective layer occupying the outermost 30% or so. Solar astronomers, using a branch of astronomy called helioseismology, have established that the Sun vibrates in several different modes, somewhat like the skin of a drum.Diagram showing the interior of the Sun. The solar interior is composed of a core (central 30%), a radiative zone outside this, and finally a convective layer occupying the outermost 30% or so. Solar astronomers, using a branch of astronomy called helioseismology, have established that the Sun vibrates in several different modes, somewhat like the skin of a drum.
Illustration of a Voyager probe at the Oort cloud. The two Voyager probes were launched in late 1970s. Voyager 1 has now passed into interstellar space - beyond the influence of the Sun's magnetic field - and Voyager 2 is set to do so in the early 2020s. Some 300 years from now, the probes will enter the beginnings of the Oort cloud - a swarm of inert comet nuclei surrounding the Sun up to perhaps 50,000 astronomical units from it. The cloud is so vast that the probes are expected to take around 40,000 years to pass through it into clear space.Illustration of a Voyager probe at the Oort cloud. The two Voyager probes were launched in late 1970s. Voyager 1 has now passed into interstellar space - beyond the influence of the Sun's magnetic field - and Voyager 2 is set to do so in the early 2020s. Some 300 years from now, the probes will enter the beginnings of the Oort cloud - a swarm of inert comet nuclei surrounding the Sun up to perhaps 50,000 astronomical units from it. The cloud is so vast that the probes are expected to take around 40,000 years to pass through it into clear space.
March 3, 2017: Czech Republic, Central Bohemia Region, Prague, Prague Old Town Square, Astronomical Clock, Bohemia, Checy,March 3, 2017: Czech Republic, Central Bohemia Region, Prague, Prague Old Town Square, Astronomical Clock, Bohemia, Checy,
Detail of the Jantar Mantar Astronomical Observatory, Jaipur, Rajasthan, IndiaDetail of the Jantar Mantar Astronomical Observatory, Jaipur, Rajasthan, India
Ancient astronomical observatory of Jantar Mantar in Jaipur, IndiaAncient astronomical observatory of Jantar Mantar in Jaipur, India
Gornergrat Astronomical Observatory and Hotel with Matterhorn, Zermatt, Alps, Valais, SwitzerlandGornergrat Astronomical Observatory and Hotel with Matterhorn, Zermatt, Alps, Valais, Switzerland
Prague, Czech Republic - June 12, 2014: Crowds of tourists in front of the Astronomical clock at Old Town Hall with Tyn Cathedral in the backgroundPrague, Czech Republic - June 12, 2014: Crowds of tourists in front of the Astronomical clock at Old Town Hall with Tyn Cathedral in the background
Jantar Mantar Astronomical Observatory, Jaipur, Rajasthan, IndiaJantar Mantar Astronomical Observatory, Jaipur, Rajasthan, India
Jantar Mantar Astronomical Observatory, Jaipur, Rajasthan, IndiaJantar Mantar Astronomical Observatory, Jaipur, Rajasthan, India
Hubble Space Telescope mosaic of the Orion nebula. 1500 light years away. This is one of the most detailed astronomical images ever produced (as of 2006). It shows thousands of stars never seen before in visible light.Hubble Space Telescope mosaic of the Orion nebula. 1500 light years away. This is one of the most detailed astronomical images ever produced (as of 2006). It shows thousands of stars never seen before in visible light.
February 27, 2008: Sun Unit Telescope 1, Moon Unit Telescope 2, Southern Cross Unit Telescope 3, Venus Unit Telescope 4 Belonging To The Very Large Telescope (Vlt) Operated By The European Southern Observatory At Paranal, Antofagasta RegionFebruary 27, 2008: Sun Unit Telescope 1, Moon Unit Telescope 2, Southern Cross Unit Telescope 3, Venus Unit Telescope 4 Belonging To The Very Large Telescope (Vlt) Operated By The European Southern Observatory At Paranal, Antofagasta Region
February 27, 2008: Sun Unit Telescope 1, Moon Unit Telescope 2, Southern Cross Unit Telescope 3 & Venus Unit Telescope 4 Belonging To The Very Large Telescope (Vlt) Operated By The European Southern Observatory On Cerro Paranal At Dusk, Antofagasta Region, ChileFebruary 27, 2008: Sun Unit Telescope 1, Moon Unit Telescope 2, Southern Cross Unit Telescope 3 & Venus Unit Telescope 4 Belonging To The Very Large Telescope (Vlt) Operated By The European Southern Observatory On Cerro Paranal At Dusk, Antofagasta Region, Chile
February 27, 2008: Auxiliary Telescope, Sun Unit Telescope 1, Moon Unit Telescope 2 & Southern Cross Unit Telescope 3, Belonging To The Very Large Telescope (Vlt) Operated By The European Southern Observatory At Paranal, Antofagasta Region, ChileFebruary 27, 2008: Auxiliary Telescope, Sun Unit Telescope 1, Moon Unit Telescope 2 & Southern Cross Unit Telescope 3, Belonging To The Very Large Telescope (Vlt) Operated By The European Southern Observatory At Paranal, Antofagasta Region, Chile
February 27, 2008: Moon Unit Telescope 2, Belonging To The Very Large Telescope (Vlt) Operated By The European Southern Observatory On Cerro Paranal At Sunset, Antofagasta Region, ChileFebruary 27, 2008: Moon Unit Telescope 2, Belonging To The Very Large Telescope (Vlt) Operated By The European Southern Observatory On Cerro Paranal At Sunset, Antofagasta Region, Chile
Santiago, Chile - July 10, 2013: Antennas at Atacama Large Millimeter/submillimeter Array (ALMA), Chajnantor Plateau, Atacama, ChileSantiago, Chile - July 10, 2013: Antennas at Atacama Large Millimeter/submillimeter Array (ALMA), Chajnantor Plateau, Atacama, Chile
Santiago, Chile - July 10, 2013: Antennas at Atacama Large Millimeter/submillimeter Array (ALMA), Chajnantor Plateau, Atacama, ChileSantiago, Chile - July 10, 2013: Antennas at Atacama Large Millimeter/submillimeter Array (ALMA), Chajnantor Plateau, Atacama, Chile
Santiago, Chile - July 10, 2013: Antennas at Atacama Large Millimeter/submillimeter Array (ALMA), Chajnantor Plateau, Atacama, ChileSantiago, Chile - July 10, 2013: Antennas at Atacama Large Millimeter/submillimeter Array (ALMA), Chajnantor Plateau, Atacama, Chile
Santiago, Chile - July 10, 2013: Male worker at the Antennas at Atacama Large Millimeter/submillimeter Array (ALMA), Chajnantor Plateau, Atacama, ChileSantiago, Chile - July 10, 2013: Male worker at the Antennas at Atacama Large Millimeter/submillimeter Array (ALMA), Chajnantor Plateau, Atacama, Chile
Santiago, Chile - July 10, 2013: Observatory, Atacama Large Millimeter/submillimeter Array (ALMA), Chajnantor Plateau, Atacama, ChileSantiago, Chile - July 10, 2013: Observatory, Atacama Large Millimeter/submillimeter Array (ALMA), Chajnantor Plateau, Atacama, Chile
Santiago, Chile - July 10, 2013: One of the Antennas at Atacama Large Millimeter/submillimeter Array (ALMA), Chajnantor Plateau, Atacama, ChileSantiago, Chile - July 10, 2013: One of the Antennas at Atacama Large Millimeter/submillimeter Array (ALMA), Chajnantor Plateau, Atacama, Chile
Santiago, Chile - July 10, 2013: Two of the Antennas at Atacama Large Millimeter/submillimeter Array (ALMA), Chajnantor Plateau, Atacama, ChileSantiago, Chile - July 10, 2013: Two of the Antennas at Atacama Large Millimeter/submillimeter Array (ALMA), Chajnantor Plateau, Atacama, Chile
Santiago, Chile - July 10, 2013: Observatory, Atacama Large Millimeter/submillimeter Array (ALMA), Chajnantor Plateau, Atacama, ChileSantiago, Chile - July 10, 2013: Observatory, Atacama Large Millimeter/submillimeter Array (ALMA), Chajnantor Plateau, Atacama, Chile
Santiago, Chile - July 10, 2013: Antennas at Atacama Large Millimeter/submillimeter Array (ALMA), Chajnantor Plateau, Atacama, ChileSantiago, Chile - July 10, 2013: Antennas at Atacama Large Millimeter/submillimeter Array (ALMA), Chajnantor Plateau, Atacama, Chile
Santiago, Chile - July 10, 2013: Antennas at Atacama Large Millimeter/submillimeter Array (ALMA), Chajnantor Plateau, Atacama, ChileSantiago, Chile - July 10, 2013: Antennas at Atacama Large Millimeter/submillimeter Array (ALMA), Chajnantor Plateau, Atacama, Chile
Santiago, Chile - July 10, 2013: Antennas at Atacama Large Millimeter/submillimeter Array (ALMA), Chajnantor Plateau, Atacama, ChileSantiago, Chile - July 10, 2013: Antennas at Atacama Large Millimeter/submillimeter Array (ALMA), Chajnantor Plateau, Atacama, Chile
Santiago, Chile - July 10, 2013: Antennas at Atacama Large Millimeter/submillimeter Array (ALMA), Chajnantor Plateau, Atacama, ChileSantiago, Chile - July 10, 2013: Antennas at Atacama Large Millimeter/submillimeter Array (ALMA), Chajnantor Plateau, Atacama, Chile
Santiago, Chile - July 10, 2013: Antennas at Atacama Large Millimeter/submillimeter Array (ALMA), Chajnantor Plateau, Atacama, ChileSantiago, Chile - July 10, 2013: Antennas at Atacama Large Millimeter/submillimeter Array (ALMA), Chajnantor Plateau, Atacama, Chile
Santiago, Chile - July 10 2013: Two male workers at the Atacama Large Millimeter/submillimeter Array (ALMA), Chajnantor Plateau, Atacama, ChileSantiago, Chile - July 10 2013: Two male workers at the Atacama Large Millimeter/submillimeter Array (ALMA), Chajnantor Plateau, Atacama, Chile
Santiago, Chile - July 10, 2013: Antennas at Atacama Large Millimeter/submillimeter Array (ALMA), Chajnantor Plateau, Atacama, ChileSantiago, Chile - July 10, 2013: Antennas at Atacama Large Millimeter/submillimeter Array (ALMA), Chajnantor Plateau, Atacama, Chile
Santiago, Chile - July 10, 2013: Antennas at Atacama Large Millimeter/submillimeter Array (ALMA), Chajnantor Plateau, Atacama, ChileSantiago, Chile - July 10, 2013: Antennas at Atacama Large Millimeter/submillimeter Array (ALMA), Chajnantor Plateau, Atacama, Chile
Santiago, Chile - July 10, 2013: Antennas at Atacama Large Millimeter/submillimeter Array (ALMA), Chajnantor Plateau, Atacama, ChileSantiago, Chile - July 10, 2013: Antennas at Atacama Large Millimeter/submillimeter Array (ALMA), Chajnantor Plateau, Atacama, Chile
Santiago, Chile - July 10, 2013: Antennas at Atacama Large Millimeter/submillimeter Array (ALMA), Chajnantor Plateau, Atacama, ChileSantiago, Chile - July 10, 2013: Antennas at Atacama Large Millimeter/submillimeter Array (ALMA), Chajnantor Plateau, Atacama, Chile
Santiago, Chile - July 10, 2013: Antennas at Atacama Large Millimeter/submillimeter Array (ALMA), Chajnantor Plateau, Atacama, ChileSantiago, Chile - July 10, 2013: Antennas at Atacama Large Millimeter/submillimeter Array (ALMA), Chajnantor Plateau, Atacama, Chile
Santiago, Chile - July 10, 2013: Antennas at Atacama Large Millimeter/submillimeter Array (ALMA), Chajnantor Plateau, Atacama, ChileSantiago, Chile - July 10, 2013: Antennas at Atacama Large Millimeter/submillimeter Array (ALMA), Chajnantor Plateau, Atacama, Chile

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