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In the latter case, the object may be called an interstellar interloper. [ 3 ] The first interstellar objects discovered were rogue planets , planets ejected from their original stellar system (e.g., OTS 44 or Cha 110913−773444 ), though they are difficult to distinguish from sub-brown dwarfs , planet-mass objects that formed in interstellar ...
List of NGC objects (2001–3000) List of NGC objects (3001–4000) List of NGC objects (4001–5000) List of NGC objects (5001–6000) List of NGC objects (6001–7000) List of NGC objects (7001–7840) List of IC objects; List of Messier objects; List of Caldwell objects; List of Herschel 400 objects; List of Melotte objects; List of ...
The listed objects currently include most objects in the asteroid belt and moons of the giant planets in this size range, but many newly discovered objects in the outer Solar System are missing, such as those included in the following reference. [58] Asteroid spectral types are mostly Tholen, but some might be SMASS.
The following is a list of Solar System objects by orbit, ordered by increasing distance from the Sun. Most named objects in this list have a diameter of 500 km or more. The Sun, a spectral class G2V main-sequence star; The inner Solar System and the terrestrial planets. 2021 PH27; Mercury. Mercury-crossing minor planets; Venus. Venus-crossing ...
An astronomical object, celestial object, stellar object or heavenly body is a naturally occurring physical entity, association, or structure that exists within the observable universe. [1] In astronomy , the terms object and body are often used interchangeably.
There are estimated to be over 100,000 Kuiper belt objects with a diameter greater than 50 km (30 mi), but the total mass of the Kuiper belt is thought to be only a tenth or even a hundredth the mass of Earth. [39] Many Kuiper belt objects have satellites, [197] and most have orbits that are substantially inclined (~10°) to the plane of the ...
NEO – (celestial object) Near-Earth object also NEA – (celestial object) Near-Earth asteroid; NEMP – (celestial object) nitrogen-enhanced metal-poor star, a type of carbon star with high amounts of nitrogen; NEODyS – (organization) Near Earth Objects Dynamic Site, an Italian web-based service that provides information on near-Earth ...
[3] [4] [5] Based on strict dictionary definitions, "astronomy" refers to "the study of objects and matter outside the Earth's atmosphere and of their physical and chemical properties", [6] while "astrophysics" refers to the branch of astronomy dealing with "the behavior, physical properties, and dynamic processes of celestial objects and ...