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Objects Encyclopedia Entry 1778162824

** The **Kuiper Belt Object (KBO)**, 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 Object (KBO)**, specifically **Eris**, is a fascinating celestial body that has garnered significant attention in the scientific community. Located in the outer reaches of the **Solar System**, **Eris** is a dwarf planet that challenges our understanding of the **Solar System**'s structure and evolution. **Eris** is a member of the **Kuiper Belt**, a region of icy bodies and other small celestial objects beyond the orbit of **Neptune**. The **Kuiper Belt** is thought to be a reservoir of small, icy bodies that were left over from the formation of the **Solar System**. **Eris** was discovered in 2005 by a team of astronomers led by **Michael Brown** at the **Palomar Observatory** in California. The discovery of **Eris** sparked a debate about the definition of a planet, as it was initially considered to be the tenth planet in our **Solar System**. However, the **International Astronomical Union (IAU)** ultimately classified **Eris** as a dwarf planet, a new category of objects created to distinguish it from the other planets in our **Solar System**. ## History/Background The study of the **Kuiper Belt** and its objects dates back to the 1990s, when astronomers began to suspect that there were many small, icy bodies beyond the orbit of **Neptune**. The discovery of **Eris** in 2005 was a significant milestone in the study of the **Kuiper Belt**, as it provided the first clear evidence of the existence of a large, icy body in this region. The discovery of **Eris** also raised questions about the definition of a planet and the classification of objects in our **Solar System**. ## Key Information **Eris** is a dwarf planet with a highly eccentric orbit that takes it as close as 37.8 astronomical units (AU) from the **Sun** and as far as 95.6 AU from the **Sun**. **Eris** has a diameter of approximately 2,326 kilometers (1,445 miles), making it slightly larger than **Pluto**. **Eris** has a highly reflective surface, indicating that it may be composed of ice and rock. The surface of **Eris** is also thought to be geologically active, with evidence of recent resurfacing and possible cryovolcanic activity. ## Significance The discovery of **Eris** has significant implications for our understanding of the **Solar System** and the formation of planets. **Eris** is thought to be a member of a new class of objects known as **dwarf planets**, which are defined as objects that are large enough to be rounded by their own gravity but have not cleared their orbits of other objects. The study of **Eris** and other **Kuiper Belt Objects** provides insights into the early formation and evolution of the **Solar System**, as well as the processes that shape the outer reaches of our **Solar System**. INFOBOX: - **Name:** Eris - **Type:** Dwarf Planet - **Date:** Discovered on January 5, 2005 - **Location:** Kuiper Belt, outer reaches of the Solar System - **Known For:** Being the first known dwarf planet in the Kuiper Belt and challenging the definition of a planet TAGS: **Dwarf Planet**, **Kuiper Belt**, **Eris**, **Solar System**, **Astronomy**, **Space Exploration**, **Planetary Science**, **Celestial Mechanics**

Objects Encyclopedia Entry 1781317024

Events Encyclopedia Entry 1777592105

** A rare astronomical event where the alignment of celestial bodies creates a spectacular display of light and color in the night sky. **CONTENT:** ## Overview **Events Encyclopedia Entry 1777592105** is a rare and awe-inspiring astronomical phenomenon that occurs when the Earth, Moon, and Sun align in a specific configuration, creating a spectacular display of light and color in the night sky. This event is also known as a **Lunar Eclipse**, but it is distinct from a regular lunar eclipse, which occurs when the Earth passes between the Sun and the Moon. **Events Encyclopedia Entry 1777592105** is a relatively rare occurrence, happening only when the Earth, Moon, and Sun are aligned in a straight line, a phenomenon known as a **Syzygy**. During this event, the Moon passes through the Earth's shadow, causing the Moon to darken and sometimes take on a reddish hue. The color of the Moon is determined by the amount of dust and water vapor in the Earth's atmosphere, which scatters the shorter wavelengths of light, such as blue and violet, and allows the longer wavelengths, such as red and orange, to pass through. This phenomenon is known as **Rayleigh Scattering**, named after the British physicist Lord Rayleigh, who first described the phenomenon in the late 19th century. ## History/Background The concept of **Events Encyclopedia Entry 1777592105** has been observed and recorded by ancient cultures for thousands of years. The earliest recorded observation of a **Lunar Eclipse** dates back to ancient China, where it was documented in the **Shang Dynasty** (16th-11th centuries BCE). The ancient Greeks also recognized the significance of **Lunar Eclipses**, which they believed were omens of great importance. The Greek philosopher Aristotle (384-322 BCE) wrote extensively on the subject, describing the phenomenon as a "darkening of the Moon". ## Key Information * **Frequency:** **Events Encyclopedia Entry 1777592105** occurs about twice a year, but only about 30% of these events are visible from a given location on Earth. * **Duration:** The duration of a **Lunar Eclipse** can range from a few minutes to several hours. * **Color:** The color of the Moon during a **Lunar Eclipse** can vary from a deep red to a pale orange, depending on the amount of dust and water vapor in the Earth's atmosphere. * **Visibility:** **Events Encyclopedia Entry 1777592105** can be seen from anywhere on the Earth where the Moon is above the horizon, but the best viewing locations are typically at high latitudes. ## Significance **Events Encyclopedia Entry 1777592105** is a rare and awe-inspiring phenomenon that has captivated human imagination for thousands of years. It is a reminder of the beauty and complexity of the universe, and the importance of continued scientific exploration and discovery. The study of **Lunar Eclipses** has also led to a greater understanding of the Earth's atmosphere and the behavior of celestial bodies. INFOBOX: - Name: **Lunar Eclipse** - Type: **Astronomical Event** - Date: **Varies** - Location: **Global** - Known For: **Rare alignment of celestial bodies** TAGS: **Lunar Eclipse**, **Astronomical Event**, **Syzygy**, **Rayleigh Scattering**, **Lunar Eclipse**, **Astronomy**, **Celestial Mechanics**, **Earth's Atmosphere**, **Moon**, **Sun**, **Earth**.