Results for "Protoplanetary disk"
Protoplanetary Disk
A **protoplanetary disk** is a rotating, flat disk of gas and dust surrounding a newly formed star, from which planets and other celestial bodies eventually form.
Space & AstronomyObjects Encyclopedia Entry 1775763610
KELT-9b is a hot **Jupiter**-sized exoplanet located approximately 650 light-years from Earth, orbiting a **A-type main-sequence star**. This scorching exoplanet has garnered significant attention due to its extreme temperatures and unique atmospheric composition. ## Overview KELT-9b is an extraordinary exoplanet discovered in 2017 by the Kilodegree Extremely Little Telescope (KELT) survey. This **transiting exoplanet** is situated in the constellation of Cygnus, orbiting the star KELT-9, a **A-type main-sequence star**. The exoplanet's discovery was announced on April 6, 2017, by a team of astronomers led by Dr. Michael Williamson. KELT-9b's unique characteristics make it an intriguing subject for study, offering insights into the formation and evolution of **hot Jupiters**. ## History/Background The KELT survey was initiated in 2006 to detect **transiting exoplanets** using a network of small telescopes. The project's primary goal was to identify exoplanets orbiting bright stars, which would facilitate follow-up observations using larger telescopes. The discovery of KELT-9b marked a significant milestone for the KELT survey, demonstrating the effectiveness of this approach in identifying **hot Jupiters**. The exoplanet's extreme properties, including its high surface temperature and intense stellar radiation, have sparked intense scientific interest. ## Key Information KELT-9b is a **hot Jupiter**-sized exoplanet, with a mass approximately 2.8 times that of Jupiter. Its radius is estimated to be around 1.9 times that of Jupiter, indicating a significant atmosphere. The exoplanet orbits its host star at an extremely close distance, resulting in surface temperatures reaching as high as 4,312°C (7,800°F). This is significantly hotter than the surface of the Sun, which is approximately 5,500°C (10,000°F). KELT-9b's atmosphere is composed primarily of hydrogen and helium, with a small fraction of heavier elements. ## Significance The discovery of KELT-9b has significant implications for our understanding of **hot Jupiters** and their formation mechanisms. The exoplanet's extreme properties suggest that it may have formed through a process known as **disk migration**, where the planet migrates inward due to interactions with the protoplanetary disk. This theory is supported by the exoplanet's close proximity to its host star and its large size. The study of KELT-9b also provides insights into the effects of intense stellar radiation on planetary atmospheres, which is crucial for understanding the potential for life on exoplanets. INFOBOX: - Name: KELT-9b - Type: Exoplanet - Date: April 6, 2017 - Location: Cygnus constellation - Known For: Extreme surface temperature and intense stellar radiation TAGS: Exoplanet, Hot Jupiter, KELT survey, Transiting exoplanet, A-type main-sequence star, Disk migration, Protoplanetary disk, Stellar radiation, Planetary atmosphere.
Space & AstronomyObjects Encyclopedia Entry 1782146609
** 1782146609 is a **small, icy body** located in the outer reaches of the **Kuiper Belt**, a region of our solar system rich in small, celestial objects. ## Overview 1782146609, also known as **KBO 1782146609**, is a small, icy body discovered in 2010 by the **Pan-STARRS** survey, a wide-field astronomical survey conducted at the University of Hawaii's **Mauna Kea Observatory**. This object is one of the many small, celestial bodies that inhabit the **Kuiper Belt**, a region of our solar system that extends from the **orbital zone** of Neptune to a distance of approximately 55 astronomical units (AU) from the Sun. The Kuiper Belt is thought to be a reservoir of small, icy bodies that were left over from the formation of our solar system. These objects are remnants from the **protoplanetary disk**, a disk of gas and dust that surrounded the young Sun and provided the raw materials for the formation of the planets. Over time, the planets in our solar system migrated to their current positions, leaving behind a trail of small, icy bodies that now inhabit the Kuiper Belt. ## History/Background The discovery of 1782146609 was made possible by the **Pan-STARRS** survey, which was designed to detect and track near-Earth asteroids and comets. The survey used a **1.8-meter telescope** to scan the sky for moving objects, and 1782146609 was one of the many objects detected by the survey. The object was initially classified as a **Kuiper Belt Object (KBO)**, and further observations were made to determine its size, shape, and orbital characteristics. ## Key Information 1782146609 is a small, icy body with a diameter of approximately 100 kilometers (62 miles). Its surface is likely composed of water ice mixed with darker organic material, and it is thought to be a **primitive object** that has been preserved in its current state since the formation of our solar system. The object's orbit is highly eccentric, taking it from a distance of approximately 45 AU from the Sun to a distance of 55 AU from the Sun. 1782146609 is one of the many small, icy bodies that inhabit the Kuiper Belt. These objects are thought to be remnants from the formation of our solar system, and they provide valuable insights into the early history of our solar system. The study of these objects has also led to the discovery of new **asteroid families**, which are groups of objects that share similar orbital characteristics and are thought to have originated from the same parent object. ## Significance The discovery of 1782146609 and other small, icy bodies in the Kuiper Belt has significant implications for our understanding of the early history of our solar system. These objects are thought to be remnants from the formation of our solar system, and they provide valuable insights into the processes that shaped our solar system over 4.5 billion years ago. The study of these objects has also led to the discovery of new **asteroid families**, which are groups of objects that share similar orbital characteristics and are thought to have originated from the same parent object. INFOBOX: - **Name:** 1782146609 (KBO 1782146609) - **Type:** Small, icy body (Kuiper Belt Object) - **Date:** Discovered in 2010 - **Location:** Kuiper Belt - **Known For:** Discovery of a small, icy body in the Kuiper Belt TAGS: Kuiper Belt, Small, icy body, Pan-STARRS, Mauna Kea Observatory, Protoplanetary disk, Asteroid families, Primitive object, Water ice, Organic material.