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Objects Encyclopedia Entry 1779343143

** The **Kuiper Belt Object (KBO)**, also known as **Eris**, is a dwarf planet located in the outer reaches of the **Solar System**, discovered in 2005. ## Overview The **Kuiper Belt** is a region of icy bodies, asteroids, and other small celestial objects beyond the orbit of **Neptune**. This vast, doughnut-shaped region is thought to be a reservoir of small, icy bodies that were left over from the formation of the **Solar System**. **Eris**, a **Kuiper Belt Object (KBO)**, is one of the most notable objects in this region, and its discovery has shed light on the composition and evolution of the outer reaches of the **Solar System**. **Eris** is a fascinating object that has captured the imagination of astronomers and space enthusiasts alike. Its discovery in 2005 by a team of astronomers led by **Michael Brown** and **Chad Trujillo** sparked a debate about the definition of a planet, ultimately leading to the reclassification of **Pluto** as a dwarf planet. **Eris** is a **Kuiper Belt Object (KBO)**, a type of celestial body that is distinct from **planets** and **dwarf planets**. ## History/Background The discovery of **Eris** was a significant event in the field of astronomy, marking the first time a **Kuiper Belt Object (KBO)** had been discovered that was larger than **Pluto**. The object was initially thought to be a **planet**, but further observations revealed that it was much smaller than initially thought. **Eris** is estimated to be approximately 2,326 kilometers (1,445 miles) in diameter, making it slightly smaller than **Pluto**. The discovery of **Eris** was made possible by the use of advanced telescopes and detection techniques. The object was first detected in 2005 using the **Palomar Observatory** in California, and subsequent observations were made using the **Hubble Space Telescope** and other ground-based telescopes. The discovery of **Eris** sparked a debate about the definition of a planet, which ultimately led to the reclassification of **Pluto** as a dwarf planet. ## Key Information **Eris** is a fascinating object that has revealed much about the composition and evolution of the outer reaches of the **Solar System**. Here are some key facts about **Eris**: * **Orbital Period:** **Eris** has an orbital period of approximately 557 Earth years, which is much longer than **Pluto**. * **Surface Composition:** **Eris** is thought to have a surface composed primarily of water ice, with a possible layer of darker material on its surface. * **Size:** **Eris** is estimated to be approximately 2,326 kilometers (1,445 miles) in diameter, making it slightly smaller than **Pluto**. * **Mass:** **Eris** has a mass of approximately 16.6 times that of **Pluto**, making it one of the most massive **Kuiper Belt Objects (KBOs)**. ## Significance The discovery of **Eris** has had a significant impact on our understanding of the outer reaches of the **Solar System**. The object has revealed much about the composition and evolution of the **Kuiper Belt**, and has sparked a debate about the definition of a planet. **Eris** has also raised questions about the possibility of other **Kuiper Belt Objects (KBOs)** that may be similar in size and composition. **Eris** is a fascinating object that continues to capture the imagination of astronomers and space enthusiasts alike. Its discovery has shed light on the composition and evolution of the outer reaches of the **Solar System**, and has sparked a debate about the definition of a planet. As we continue to explore the **Kuiper Belt** and other regions of the **Solar System**, we may uncover even more secrets about the formation and evolution of our celestial neighborhood. INFOBOX: - **Name:** Eris - **Type:** Dwarf Planet - **Date:** Discovered in 2005 - **Location:** **Kuiper Belt** - **Known For:** Being one of the most massive **Kuiper Belt Objects (KBOs)** and sparking a debate about the definition of a planet. TAGS: **Kuiper Belt Object (KBO)**, **Dwarf Planet**, **Solar System**, **Pluto**, **Palomar Observatory**, **Hubble Space Telescope**, **Astronomy**, **Space Exploration**.