Dawn (spacecraft) and NEAR Shoemaker

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Difference between Dawn (spacecraft) and NEAR Shoemaker

Dawn (spacecraft) vs. NEAR Shoemaker

Dawn is a space probe launched by NASA in September 2007 with the mission of studying two of the three known protoplanets of the asteroid belt, Vesta and Ceres. The Near Earth Asteroid Rendezvous – Shoemaker (NEAR Shoemaker), renamed after its 1996 launch in honor of planetary scientist Eugene Shoemaker, was a robotic space probe designed by the Johns Hopkins University Applied Physics Laboratory for NASA to study the near-Earth asteroid Eros from close orbit over a period of a year.

Asteroid

Asteroids are minor planets, especially those of the inner Solar System.

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Astronomical unit

The astronomical unit (symbol: au, ua, or AU) is a unit of length, roughly the distance from Earth to the Sun.

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Cape Canaveral Air Force Station

Cape Canaveral Air Force Station (CCAFS) (known as Cape Kennedy Air Force Station from 1963 to 1973) is an installation of the United States Air Force Space Command's 45th Space Wing.

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Cape Canaveral Air Force Station Space Launch Complex 17

Cape Canaveral Air Force Station Space Launch Complex 17 (SLC-17), previously designated Launch Complex 17 (LC-17), was a launch site at Cape Canaveral Air Force Station, Florida used for Thor and Delta rocket launches between 1958 and 2011.

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Charge-coupled device

A charge-coupled device (CCD) is a device for the movement of electrical charge, usually from within the device to an area where the charge can be manipulated, for example conversion into a digital value.

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Delta II

Delta II is an expendable launch system, originally designed and built by McDonnell Douglas.

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Delta-v

Delta-v (literally "change in velocity"), symbolised as ∆v and pronounced delta-vee, as used in spacecraft flight dynamics, is a measure of the impulse that is needed to perform a maneuver such as launch from, or landing on a planet or moon, or in-space orbital maneuver.

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Discovery Program

NASA's Discovery Program is a series of lower-cost (as compared to New Frontiers or Flagship Programs), highly focused American scientific space missions that are exploring the Solar System.

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Gallium arsenide

Gallium arsenide (GaAs) is a compound of the elements gallium and arsenic.

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Gravity assist

In orbital mechanics and aerospace engineering, a gravitational slingshot, gravity assist maneuver, or swing-by is the use of the relative movement (e.g. orbit around the Sun) and gravity of a planet or other astronomical object to alter the path and speed of a spacecraft, typically to save propellant and reduce expense.

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Hydrazine

Hydrazine is an inorganic compound with the chemical formula (also written), called diamidogen, archaically.

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Infrared

Infrared radiation (IR) is electromagnetic radiation (EMR) with longer wavelengths than those of visible light, and is therefore generally invisible to the human eye (although IR at wavelengths up to 1050 nm from specially pulsed lasers can be seen by humans under certain conditions). It is sometimes called infrared light.

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Magnetometer

A magnetometer is an instrument that measures magnetism—either the magnetization of a magnetic material like a ferromagnet, or the direction, strength, or relative change of a magnetic field at a particular location.

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NASA

The National Aeronautics and Space Administration (NASA) is an independent agency of the executive branch of the United States federal government responsible for the civilian space program, as well as aeronautics and aerospace research.

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Near-Earth object

A near-Earth object (NEO) is any small Solar System body whose orbit can bring it into proximity with Earth.

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Perihelion and aphelion

The perihelion of any orbit of a celestial body about the Sun is the point where the body comes nearest to the Sun.

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Reaction wheel

A reaction wheel (RW) is a type of flywheel used primarily by spacecraft for three axis attitude control, which doesn't require rockets or external applicators of torque.

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Safe mode (spacecraft)

Safe mode is an operating mode of a modern spacecraft during which all non-essential systems are shut down and only essential functions such as thermal management, radio reception and attitude control are active.

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Science (journal)

Science, also widely referred to as Science Magazine, is the peer-reviewed academic journal of the American Association for the Advancement of Science (AAAS) and one of the world's top academic journals.

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Solar panel

Photovoltaic solar panels absorb sunlight as a source of energy to generate electricity.

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Space probe

A space probe is a robotic spacecraft that does not orbit the Earth, but, instead, explores further into outer space.

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253 Mathilde

253 Mathilde is an asteroid in the intermediate asteroid belt, approximately 50 kilometers in diameter, that was discovered by Austrian astronomer Johann Palisa at Vienna Observatory on 12 November 1885.

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4 Vesta

Vesta, minor-planet designation 4 Vesta, is one of the largest objects in the asteroid belt, with a mean diameter of.

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433 Eros

433 Eros, provisional designation, is a stony and elongated asteroid of the Amor group and the first discovered and second-largest near-Earth object with a mean-diameter of approximately 16.8 kilometers.

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