Historical Events tagged with "planet"

Turns out history loves a label—battles, breakthroughs, and the occasional disaster, all neatly tagged for your browsing pleasure. Because sometimes you just need every weird invention in one place.

Space Exploration

Final Transit of Venus Until 2117

June 5th, 2012 12 years ago

The last transit of Venus before 2117 captivated astronomers and skywatchers worldwide. On this day, Venus passed directly between the Earth and the Sun, creating a small silhouette that traversed the solar disk. This rare celestial alignment provided an extraordinary opportunity for scientists to study transits and better understand the distances between celestial bodies. Observers gathered in various locations, using telescopes and protective filters, to witness the delicate movement of Venus across the Sun, a sight not to be repeated for over a century.

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Space Exploration

Pluto Reclassified as Dwarf Planet

August 24th, 2006 18 years ago

In a landmark decision, the International Astronomical Union redefined what constitutes a planet, resulting in Pluto being reclassified as a dwarf planet. Held at the IAU General Assembly in Prague, this change stemmed from a growing body of astronomical evidence and debate concerning the characteristics of celestial bodies in our solar system. The decision sparked discussions among astronomers, educators, and the public regarding Pluto's place in our cosmic neighborhood.

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Space Exploration

Voyager 2 Encounters Neptune Closely

August 25th, 1989 35 years ago

Voyager 2 spacecraft made its closest approach to Neptune, the last planet in the Solar System at the time. This significant event occurred on August 25, 1989, as Voyager 2 flew within 4,800 kilometers of Neptune's cloud tops. The spacecraft captured stunning images and data, providing the first close-up view of Neptune and its moons, vastly expanding our understanding of this distant planet and its features, including Neptune's Great Dark Spot, a massive storm system.

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Space Exploration

Voyager 2's Historic Saturn Encounter

August 25th, 1981 43 years ago

Voyager 2 achieved its closest approach to Saturn, providing unprecedented data about the planet and its moons. Launched in 1977, the spacecraft traveled over 3.5 billion kilometers to study Saturn's atmosphere, rings, and numerous satellites. This flyby allowed scientists to capture detailed images revealing the stunning characteristics of the ring system and the intriguing properties of Titan, Saturn's largest moon. The encounter significantly contributed to our understanding of the gas giants.

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Space Exploration

Voyager I Captures Earth-Moon Photo

September 18th, 1977 47 years ago

Voyager I, a spacecraft launched by NASA, takes a groundbreaking photograph of Earth and its natural satellite, the Moon, together as viewed from a distance of about 7.25 million miles. The image captures the delicate blue and white orb of Earth alongside the gray, cratered surface of the Moon. This photograph is significant as it offers a unique perspective of our planet within the expanse of space, highlighting the relationship between Earth and its satellite.

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Space Exploration

Mariner 9 Achieves Mars Orbit

November 14th, 1971 53 years ago

Mariner 9 successfully entered orbit around Mars, marking the first time a spacecraft orbited another planet. Launched by NASA, it arrived at Mars after a nearly 11-month journey. The orbiter's mission aimed to gather data on Mars' surface and atmosphere, contributing to our understanding of the planet's geology and potential for life. Notable images captured by Mariner 9 revealed Martian features such as volcanoes and canyons, sparking excitement and scientific interest worldwide.

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Space Exploration

Proposal of 'Pluto' as a Dwarf Planet Name

May 1st, 1930 94 years ago

Vesto Slipher of Lowell Observatory proposed 'Pluto' as the name for a newly discovered dwarf planet in the 1930 Lowell Observatory Observation Circular. The proposition caught public attention, becoming widely adopted in astronomy and popular culture. The choice honored the Roman god of the underworld, reinforcing the mysterious nature of this distant celestial body. The name 'Pluto' was suggested after a poll among the staff at Lowell Observatory, which resonated with both scientific and mythological significance.

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Space Exploration

Discovery of Pluto Announced by Lowell Observatory

March 13th, 1930 95 years ago

Astronomer Clyde Tombaugh announces the discovery of Pluto, the first trans-Neptunian object. This announcement by the Lowell Observatory in Flagstaff, Arizona, marked a significant milestone in astronomy and deepened our understanding of the solar system. Tombaugh's systematic search for a ninth planet was driven by discrepancies in the orbits of known planets, leading to this groundbreaking discovery.

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Space Exploration

Discovery of Ceres by Giuseppe Piazzi

January 1st, 1801 224 years ago

Giuseppe Piazzi discovered Ceres, the first known asteroid, on January 1, 1801, while observing the night sky from Palermo, Sicily. This celestial body, later classified as a dwarf planet, was found amidst the transition between the planet classifications of celestial objects. Piazzi initially thought he had found a new planet, naming it after the Roman goddess of agriculture, Ceres. The discovery marked a significant addition to the understanding of objects in our solar system and laid the groundwork for future astronomical studies.

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