{"slug": "solar-system", "label": "Solar System", "wikipedia": "https://en.wikipedia.org/wiki/Solar_System", "wikidata": "https://www.wikidata.org/wiki/Q544", "qid": "Q544", "description": "the Sun, its planets and their moons", "entries": 14, "years": 14, "span": [-279, 2017], "span_label": ["280 BCE", "2017 CE"], "topics": [{"title": "Science & Discovery", "count": 13}, {"title": "Religion & Belief", "count": 1}], "related": [{"slug": "roman-catholic-church", "label": "Roman Catholic Church", "shared": 1}, {"slug": "galileo-galilei", "label": "Galileo Galilei", "shared": 1}, {"slug": "jupiter", "label": "Jupiter", "shared": 1}, {"slug": "mars", "label": "Mars", "shared": 1}, {"slug": "venus", "label": "Venus", "shared": 1}, {"slug": "saturn", "label": "Saturn", "shared": 1}, {"slug": "mercury-planet", "label": "Mercury (planet)", "shared": 1}, {"slug": "earth", "label": "Earth", "shared": 1}, {"slug": "moon", "label": "Moon", "shared": 1}, {"slug": "halley-s-comet", "label": "Halley's Comet", "shared": 1}, {"slug": "johannes-kepler", "label": "Johannes Kepler", "shared": 1}, {"slug": "neptune", "label": "Neptune", "shared": 1}], "items": [{"year": -279, "year_label": "280 BCE", "section": "Science & Discovery", "date": null, "text": "Aristarchus of Samos uses the size of the Earth's shadow on the Moon to estimate that the Moon's radius is one-third that of the Earth. He proposes, for the first time, a heliocentric view of the Solar System, but is ignored due to the lack of evidence of the Earth's motion.", "cite": {"url": "https://en.wikipedia.org/w/index.php?oldid=1338748993#Astronomy", "title": "280 BC", "revid": 1338748993, "section": "Events › By topic › Astronomy"}}, {"year": 511, "year_label": "511 CE", "section": "Science & Discovery", "date": null, "text": "Aryabhata, Indian astronomer and mathematician, comes up with concepts of mathematical equations, one of which explains the rotation of the Earth on its axis. This concept is far ahead of its time and he is fairly accurate in his description of it. He also comes up with a lot of other ideas about the Solar System, but many of them are flawed because he considers the Earth to be the center of the universe. Aryabhata is often given credit for coming up with the number zero and using it as a placeholder.", "cite": {"url": "https://en.wikipedia.org/w/index.php?oldid=1364740421#Inventions", "title": "511", "revid": 1364740421, "section": "Events › By topic › Inventions"}}, {"year": 1614, "year_label": "1614 CE", "section": "Science & Discovery", "date": null, "text": "Astronomer Johannes Kepler soon begins to employ logarithms, in his description of the Solar System.", "cite": {"url": "https://en.wikipedia.org/w/index.php?oldid=1372816433#Date_unknown", "title": "1614", "revid": 1372816433, "section": "Events › Date unknown"}}, {"year": 1633, "year_label": "1633 CE", "section": "Religion & Belief", "date": "June 22", "text": "June 22 – the Roman Catholic Church forces Galileo Galilei to recant his heliocentric view of the Solar System. According to legend, he claims Eppur si muove.", "cite": {"url": "https://en.wikipedia.org/w/index.php?oldid=1369169348#April–June", "title": "1633", "revid": 1369169348, "section": "Events › April–June"}}, {"year": 1899, "year_label": "1899 CE", "section": "Science & Discovery", "date": "December 2", "text": "December 2 – During the new moon, a near-grand conjunction of the classical planets and several binocular Solar System bodies occur. The Sun, Moon, Mercury, Mars and Saturn are all within 15° of each other, with Venus 5° ahead of this conjunction and Jupiter 15° behind.", "cite": {"url": "https://en.wikipedia.org/w/index.php?oldid=1371393177#December", "title": "1899", "revid": 1371393177, "section": "Events › December"}}, {"year": 1972, "year_label": "1972 CE", "section": "Science & Discovery", "date": "March 2", "text": "March 2 – The Pioneer 10 spacecraft is launched from Cape Kennedy, to be the first man-made spacecraft to leave the Solar System.", "cite": {"url": "https://en.wikipedia.org/w/index.php?oldid=1371514417#March", "title": "1972", "revid": 1371514417, "section": "Events › March"}}, {"year": 1973, "year_label": "1973 CE", "section": "Science & Discovery", "date": "April 5", "text": "April 5 – Pioneer 11 is launched on a mission to study the Solar System.", "cite": {"url": "https://en.wikipedia.org/w/index.php?oldid=1373239256#April", "title": "1973", "revid": 1373239256, "section": "Events › April"}}, {"year": 1977, "year_label": "1977 CE", "section": "Science & Discovery", "date": "November 1", "text": "November 1 – 2060 Chiron, first of the outer Solar System asteroids known as Centaurs, is discovered by Charlie Kowal.", "cite": {"url": "https://en.wikipedia.org/w/index.php?oldid=1371657539#November", "title": "1977", "revid": 1371657539, "section": "Events › November"}}, {"year": 1983, "year_label": "1983 CE", "section": "Science & Discovery", "date": "June 13", "text": "June 13 – Pioneer 10 passes the orbit of Neptune, becoming the first human-made object to leave the vicinity of the major planets of the Solar System.", "cite": {"url": "https://en.wikipedia.org/w/index.php?oldid=1366392977#June", "title": "1983", "revid": 1366392977, "section": "Events › June"}}, {"year": 1986, "year_label": "1986 CE", "section": "Science & Discovery", "date": "February 9", "text": "February 9 – Halley's Comet reaches its perihelion, the closest point to the Sun, during its second visit to the Solar System in the 20th century (the first was in 1910).", "cite": {"url": "https://en.wikipedia.org/w/index.php?oldid=1373510075#February", "title": "1986", "revid": 1373510075, "section": "Events › February"}}, {"year": 1998, "year_label": "1998 CE", "section": "Science & Discovery", "date": "November 17", "text": "November 17 – Voyager 1 overtakes Pioneer 10 as the most distant man-made object from the Solar System, at a distance of 69.419 AU km.", "cite": {"url": "https://en.wikipedia.org/w/index.php?oldid=1373236679#November", "title": "1998", "revid": 1373236679, "section": "Events › November"}}, {"year": 2005, "year_label": "2005 CE", "section": "Science & Discovery", "date": "January 5", "text": "January 5 – Eris, the most massive known dwarf planet in the Solar System, is discovered by a team led by Michael E. Brown using images originally taken on October 21, 2003, at the Palomar Observatory.", "cite": {"url": "https://en.wikipedia.org/w/index.php?oldid=1368527363#January", "title": "2005", "revid": 1368527363, "section": "Events › January"}}, {"year": 2012, "year_label": "2012 CE", "section": "Science & Discovery", "date": "August 25", "text": "August 25 – The Voyager 1 space probe becomes the first human-made object to successfully exit the Solar System and enter Interstellar space, and to an extent, becoming the first Interstellar probe, pioneering Interstellar exploration.", "cite": {"url": "https://en.wikipedia.org/w/index.php?oldid=1373434549#August", "title": "2012", "revid": 1373434549, "section": "Events › August"}}, {"year": 2017, "year_label": "2017 CE", "section": "Science & Discovery", "date": "November 20", "text": "November 20 – Nature publishes an article recognising the high-velocity asteroid ʻOumuamua as originating from outside the Solar System, i.e. the first known interstellar object.", "cite": {"url": "https://en.wikipedia.org/w/index.php?oldid=1371948773#November", "title": "2017", "revid": 1371948773, "section": "Events › November"}}]}