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  2. Co-orbital configuration - Wikipedia

    en.wikipedia.org/wiki/Co-orbital_configuration

    The most common and best-known class is the trojan, which librates around one of the two stable Lagrangian points (Trojan points), L 4 and L 5, 60° ahead of and behind the larger body respectively. Another class is the horseshoe orbit, in which objects librate around 180° from the larger body. Objects librating around 0° are called quasi ...

  3. Orbital spaceflight - Wikipedia

    en.wikipedia.org/wiki/Orbital_spaceflight

    An orbital spaceflight (or orbital flight) is a spaceflight in which a spacecraft is placed on a trajectory where it could remain in space for at least one orbit. To do this around the Earth, it must be on a free trajectory which has an altitude at perigee (altitude at closest approach) around 80 kilometers (50 mi); this is the boundary of ...

  4. Orbital maneuver - Wikipedia

    en.wikipedia.org/wiki/Orbital_maneuver

    In spaceflight, an orbital maneuver (otherwise known as a burn) is the use of propulsion systems to change the orbit of a spacecraft. For spacecraft far from Earth, an orbital maneuver is called a deep-space maneuver (DSM). [1] When a spacecraft is not conducting a maneuver, especially in a transfer orbit, it is said to be coasting.

  5. Asteroids safely fly by Earth all the time. Here’s why ...

    www.aol.com/asteroids-safely-fly-earth-time...

    Set to launch no earlier than June 2028, the telescope is designed to discover 90% of asteroids and comets that are 460 feet in size or larger and come within 30 million miles of Earth’s orbit ...

  6. Orbital mechanics - Wikipedia

    en.wikipedia.org/wiki/Orbital_mechanics

    and are the masses of objects 1 and 2, and is the specific angular momentum of object 2 with respect to object 1. The parameter θ {\displaystyle \theta } is known as the true anomaly , p {\displaystyle p} is the semi-latus rectum , while e {\displaystyle e} is the orbital eccentricity , all obtainable from the various forms of the six ...

  7. Gravity turn - Wikipedia

    en.wikipedia.org/wiki/Gravity_turn

    A gravity turn is commonly used with rocket powered vehicles that launch vertically, like the Space Shuttle. The rocket begins by flying straight up, gaining both vertical speed and altitude. During this portion of the launch, gravity acts directly against the thrust of the rocket, lowering its vertical acceleration.

  8. Lucy (spacecraft) - Wikipedia

    en.wikipedia.org/wiki/Lucy_(spacecraft)

    Lucy is a NASA space probe on a twelve-year journey to eight different asteroids. It is slated to visit two main belt asteroids as well as six Jupiter trojans – asteroids that share Jupiter's orbit around the Sun, orbiting either ahead of or behind the planet. [4] [5] All target encounters will be flyby encounters. [6]

  9. Trojan (celestial body) - Wikipedia

    en.wikipedia.org/wiki/Trojan_(celestial_body)

    In astronomy, a trojan is a small celestial body (mostly asteroids) that shares the orbit of a larger body, remaining in a stable orbit approximately 60° ahead of or behind the main body near one of its Lagrangian points L 4 and L 5. Trojans can share the orbits of planets or of large moons. Trojans are one type of co-orbital object.

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