Results for "**Moons**"
Objects Encyclopedia Entry 1775324344
** The **Kuiper Belt Object (KBO)** 2007 OR10, also known as Eris, is a dwarf planet located in the outer reaches of the **Solar System**, beyond the orbit of **Neptune**. ## Overview The **Kuiper Belt** is a region of icy bodies, asteroids, and other small celestial objects that extends from about 30 to 55 astronomical units (AU) from the **Sun**. Within this vast expanse, a multitude of **Kuiper Belt Objects (KBOs)** have been discovered, each with its unique characteristics. One such fascinating object is 2007 OR10, also known as Eris. This dwarf planet was discovered on July 26, 2007, by the Palomar Observatory in California, USA. Initially thought to be the tenth **Pluto**, it was later classified as a dwarf planet due to its size and orbital characteristics. Eris is a fascinating object that has contributed significantly to our understanding of the **Solar System**. Its discovery sparked a debate about the definition of a planet, ultimately leading to the reclassification of Pluto as a dwarf planet. This event marked a significant shift in our understanding of the **Solar System** and its many mysteries. ## History/Background The discovery of Eris is a fascinating story that began with the observations of the **Palomar Observatory**. The observatory's 1.2-meter Schmidt telescope was used to scan the skies for objects in the **Kuiper Belt**. On July 26, 2007, a team of astronomers led by Mike Brown, Chad Trujillo, and David Rabinowitz discovered a small, icy object with an unusual orbit. Initial observations suggested that the object was similar in size to Pluto, leading to speculation that it might be the tenth **Pluto**. However, further observations revealed that Eris was slightly larger than Pluto, with a diameter of approximately 2,326 kilometers (1,445 miles). This discovery sparked a heated debate about the definition of a planet, with some arguing that Eris should be considered the tenth planet. Ultimately, the **International Astronomical Union (IAU)** redefined the term "planet" in 2006, classifying Eris as a dwarf planet due to its size and orbital characteristics. ## Key Information Eris is a fascinating object with several unique characteristics. Here are some key facts about this dwarf planet: * **Diameter:** Approximately 2,326 kilometers (1,445 miles) * **Mass:** Estimated to be around 16% of the mass of **Pluto** * **Orbit:** Eris has a highly eccentric orbit, taking it as close as 37.8 AU from the **Sun** and as far as 95.6 AU from the **Sun** * **Surface:** Eris has a surface composed primarily of water ice, with possible tholins (complex organic molecules) present * **Moons:** Eris has one known moon, Dysnomia, which was discovered in 2005 ## Significance The discovery of Eris has had a significant impact on our understanding of the **Solar System**. Its discovery sparked a debate about the definition of a planet, ultimately leading to the reclassification of Pluto as a dwarf planet. This event marked a significant shift in our understanding of the **Solar System** and its many mysteries. Eris is also an important object for studying the formation and evolution of the **Solar System**. Its highly eccentric orbit suggests that it may have formed in a different region of the **Solar System**, possibly in the **Oort Cloud**. Studying Eris and other KBOs can provide valuable insights into the early history of the **Solar System** and the formation of the planets. INFOBOX: - **Name:** 2007 OR10 (Eris) - **Type:** Dwarf Planet - **Date:** July 26, 2007 - **Location:** **Kuiper Belt** - **Known For:** Discovery of a dwarf planet that sparked a debate about the definition of a planet TAGS: **Kuiper Belt Object**, **Dwarf Planet**, **Solar System**, **Pluto**, **International Astronomical Union**, **Orbital Characteristics**, **Surface Composition**, **Moons**
Space & AstronomyMissions Encyclopedia Entry 1782255147
The Cassini-Huygens mission was a collaborative effort between NASA, the European Space Agency (ESA), and the Italian Space Agency (ASI) to explore Saturn and its moons. ## Overview The Cassini-Huygens mission was a groundbreaking space exploration endeavor that aimed to study Saturn, its rings, and its moons in unprecedented detail. Launched on October 15, 1997, the mission consisted of two main components: the Cassini orbiter and the Huygens lander. The Cassini orbiter was designed to orbit Saturn for four years, while the Huygens lander was intended to descend onto the surface of Saturn's moon Titan. The mission was named after the 17th-century astronomers Giovanni Cassini and Christiaan Huygens, who made significant contributions to the study of Saturn. The Cassini-Huygens mission was a collaborative effort between NASA, the ESA, and the ASI. The mission was managed by NASA's Jet Propulsion Laboratory (JPL) in Pasadena, California, while the ESA's European Astronaut Centre in Cologne, Germany, was responsible for the development of the Huygens lander. The mission's scientific objectives were to study Saturn's atmosphere, rings, and moons, as well as to search for evidence of a liquid water ocean beneath the surface of Enceladus, one of Saturn's moons. ## History/Background The concept of the Cassini-Huygens mission dates back to the 1980s, when NASA and the ESA began discussing a joint mission to explore Saturn. The mission was initially planned to launch in 2000, but it was delayed several times due to technical and budgetary issues. The mission finally launched on October 15, 1997, from the Baikonur Cosmodrome in Kazakhstan. The Cassini orbiter and the Huygens lander were launched together on a Russian Proton rocket, which placed them into a transfer orbit around the Sun. After a six-year journey, the Cassini-Huygens spacecraft arrived at Saturn on July 1, 2004. The orbiter entered into orbit around Saturn, while the Huygens lander separated from the orbiter and began its descent onto Titan. The Huygens lander successfully landed on Titan's surface on January 14, 2005, sending back a wealth of data and images to Earth. ## Key Information The Cassini-Huygens mission achieved numerous scientific milestones during its four-year mission. Some of the key findings include: * **Discovery of geysers on Enceladus**: The Cassini mission discovered a system of geysers on Enceladus, which suggested that the moon had a liquid water ocean beneath its surface. * **Detection of complex organic molecules**: The Cassini mission detected complex organic molecules in the atmosphere of Titan, which suggested that the moon had the building blocks of life. * **Study of Saturn's rings**: The Cassini mission studied Saturn's rings in unprecedented detail, revealing the complex structure and dynamics of the ring system. * **Imaging of Saturn's moons**: The Cassini mission imaged Saturn's moons in stunning detail, revealing the diverse geology and composition of the moons. ## Significance The Cassini-Huygens mission was a groundbreaking achievement in space exploration, providing a wealth of new information about Saturn and its moons. The mission's findings have significant implications for our understanding of the origins of life in the universe and the potential for life on other planets. The mission also demonstrated the power of international collaboration in space exploration, highlighting the benefits of working together to achieve a common goal. INFOBOX: - Name: Cassini-Huygens Mission - Type: Space exploration mission - Date: 1997-2017 - Location: Saturn and its moons - Known For: Discovery of geysers on Enceladus and detection of complex organic molecules on Titan TAGS: **Saturn**, **Titan**, **Enceladus**, **Space exploration**, **International collaboration**, **Astrobiology**, **Planetary science**, **Ring systems**, **Moons**
Space & AstronomyMissions Encyclopedia Entry 1782898745
** The **Missions Encyclopedia Entry 1782898745** refers to the **New Horizons** spacecraft mission, a historic interplanetary exploration that successfully flew by Pluto and its moons, providing groundbreaking insights into the Kuiper Belt and the outer reaches of our solar system. ## Overview The **New Horizons** mission was a groundbreaking interplanetary exploration that marked a new era in space travel and astronomy. Launched on January 19, 2006, from Cape Canaveral Air Force Station in Florida, the spacecraft was designed to study the Pluto system and the Kuiper Belt, a region of icy bodies and small celestial objects beyond Neptune. Led by the **Johns Hopkins University Applied Physics Laboratory** and managed by **NASA's** **Marshall Space Flight Center**, the mission aimed to explore the uncharted territory of the outer solar system and shed light on the formation and evolution of our cosmic neighborhood. The **New Horizons** spacecraft was a marvel of modern engineering, equipped with a suite of sophisticated instruments designed to study the Pluto system in unprecedented detail. The spacecraft's primary objectives included characterizing the geology, atmosphere, and composition of Pluto, as well as exploring the moons of Pluto, including Charon, Nix, Hydra, Kerberos, and Styx. The mission also aimed to study the Kuiper Belt, a region of icy bodies and small celestial objects that holds secrets about the early formation and evolution of our solar system. ## History/Background The concept of the **New Horizons** mission dates back to the 1990s, when **Alan Stern**, a renowned planetary scientist, first proposed a mission to explore the Pluto system. Stern's idea was initially met with skepticism, but he persevered, and his vision eventually gained support from NASA and the scientific community. The mission was officially approved in 2003, and the spacecraft was built by **Astrium** (now part of **Airbus Defence and Space**). The launch of **New Horizons** on January 19, 2006, marked the beginning of a historic journey that would take the spacecraft over 3 billion miles into the outer reaches of our solar system. ## Key Information **New Horizons** flew by Pluto on July 14, 2015, at a distance of approximately 7,800 miles (12,500 kilometers), providing the first close-up images and data about the dwarf planet. The spacecraft's instruments, including the **Ralph** and **Alice** color cameras, the **LEISA** infrared spectrometer, and the **SWAP** solar wind instrument, collected a wealth of information about Pluto's surface, atmosphere, and composition. The mission revealed a diverse and complex geology, with features such as mountains, valleys, and even evidence of recent geological activity. The **New Horizons** spacecraft also discovered a system of moons around Pluto, including Charon, the largest moon in the solar system relative to its parent planet. The mission's findings have significantly expanded our understanding of the Pluto system and the Kuiper Belt. The discovery of Pluto's moons and the characterization of its surface geology have provided new insights into the formation and evolution of our solar system. The **New Horizons** mission has also demonstrated the feasibility of interplanetary travel and the potential for future missions to explore the outer reaches of our solar system. ## Significance The **New Horizons** mission has had a profound impact on our understanding of the solar system and the universe. The mission's findings have challenged our previous understanding of Pluto and the Kuiper Belt, and have opened up new avenues for research and exploration. The mission has also inspired a new generation of scientists, engineers, and explorers, and has demonstrated the power of human ingenuity and curiosity. The **New Horizons** mission has also paved the way for future interplanetary missions, including the **Pioneer** and **Voyager** spacecraft, which continue to explore the outer reaches of our solar system. The mission's success has also sparked interest in the exploration of the Kuiper Belt and the search for new celestial objects, such as dwarf planets and asteroids. INFOBOX: - **Name:** New Horizons - **Type:** Interplanetary spacecraft mission - **Date:** January 19, 2006 (launch) - **Location:** Pluto system, Kuiper Belt - **Known For:** First close-up images and data about Pluto and its moons TAGS: **New Horizons**, **Pluto**, **Kuiper Belt**, **Interplanetary Spacecraft**, **Space Exploration**, **Astronomy**, **Solar System**, **Dwarf Planet**, **Moons**, **Geology**, **Atmosphere**, **Composition**.
Space & AstronomyMissions Encyclopedia Entry 1779070457
The Galileo Galilei Spacecraft (GGS) was a NASA mission launched in 1989 to study the Jupiter system, providing groundbreaking insights into the planet's magnetosphere, atmosphere, and moons. ## Overview The Galileo Galilei Spacecraft (GGS) was a NASA mission designed to explore the Jupiter system, focusing on the planet's magnetosphere, atmosphere, and moons. The spacecraft was launched on October 18, 1989, aboard the Space Shuttle Atlantis (STS-34) and traveled over 2.2 billion miles to reach Jupiter's orbit. During its 14-year mission, GGS made numerous discoveries that significantly expanded our understanding of the Jupiter system. The GGS was equipped with a suite of scientific instruments, including a magnetometer, a plasma detector, and a camera system. These instruments allowed the spacecraft to study the Jupiter system in unprecedented detail, providing valuable insights into the planet's magnetic field, atmospheric composition, and moon geology. The mission's primary objectives were to study the Jupiter system's magnetosphere, the planet's atmosphere, and the composition of its moons. ## History/Background The concept of the Galileo Galilei Spacecraft mission dates back to the 1970s, when NASA began planning a mission to explore the Jupiter system. The mission was initially proposed as a flyby mission, but it was later modified to include a Jupiter orbit insertion. The spacecraft was named after the Italian astronomer Galileo Galilei, who first observed the planet Jupiter in 1610. The GGS was built by NASA's Jet Propulsion Laboratory (JPL) and was launched on October 18, 1989, aboard the Space Shuttle Atlantis. The GGS entered Jupiter's orbit on December 7, 1995, and began its primary mission to study the planet's magnetosphere, atmosphere, and moons. During its 14-year mission, the spacecraft made numerous discoveries, including the detection of a subsurface ocean on the moon Europa and the discovery of a strong magnetic field around the moon Ganymede. ## Key Information The Galileo Galilei Spacecraft made several key discoveries during its mission, including: * **Detection of a subsurface ocean on Europa**: The GGS detected a subsurface ocean on the moon Europa, which is thought to be composed of liquid water and is a potential candidate for supporting life. * **Discovery of a strong magnetic field around Ganymede**: The GGS discovered a strong magnetic field around the moon Ganymede, which is thought to be powered by the moon's interior. * **Study of Jupiter's magnetosphere**: The GGS studied Jupiter's magnetosphere in unprecedented detail, providing valuable insights into the planet's magnetic field and its interaction with the solar wind. * **Imaging of Jupiter's atmosphere**: The GGS captured stunning images of Jupiter's atmosphere, including the planet's Great Red Spot and its cloud bands. ## Significance The Galileo Galilei Spacecraft mission was a groundbreaking achievement in space exploration, providing valuable insights into the Jupiter system and its moons. The mission's discoveries have significantly expanded our understanding of the Jupiter system and have paved the way for future missions to explore the outer planets. INFOBOX: - Name: Galileo Galilei Spacecraft (GGS) - Type: NASA Spacecraft - Date: October 18, 1989 (launch) - September 21, 2003 (mission end) - Location: Jupiter system - Known For: Detection of a subsurface ocean on Europa and discovery of a strong magnetic field around Ganymede TAGS: **Galileo Galilei Spacecraft**, **Jupiter system**, **Magnetosphere**, **Atmosphere**, **Moons**, **Space Exploration**, **NASA**, **Jupiter**, **Europa**, **Ganymede**