Applied Physics Laboratory in the context of NEAR Shoemaker


Applied Physics Laboratory in the context of NEAR Shoemaker

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⭐ Core Definition: Applied Physics Laboratory

The Johns Hopkins University Applied Physics Laboratory (also known simply as Applied Physics Laboratory or APL) is a not-for-profit, United States Navy-sponsored, university-affiliated research center (UARC) in Howard County, Maryland, United States.

APL is affiliated with Johns Hopkins University and employs more than 8,800 people as of 2025. APL is the nation's largest UARC. APL conducts research, engineering and analysis to address national security and scientific challenges faced by the United States and its allies. The Laboratory brings together technical expertise, longstanding experience and specialized facilities to support rapid prototyping and long-term research and development. APL works across a range of domains, contributing to both operational systems and foundational science and technology.

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👉 Applied Physics Laboratory in the context of NEAR Shoemaker

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. It was the first spacecraft to orbit an asteroid and land on it successfully. In February 2000, the mission closed in on the asteroid and orbited it. On February 12, 2001, Shoemaker touched down on the asteroid and was terminated just over two weeks later.

The primary scientific objective of NEAR was to return data on the bulk properties, composition, mineralogy, morphology, internal mass distribution, and magnetic field of Eros. Secondary objectives include studies of regolith properties, interactions with the solar wind, possible current activity as indicated by dust or gas, and the asteroid spin state. This data was used to help understand the characteristics of asteroids in general, their relationship to meteoroids and comets, and the conditions in the early Solar System. To accomplish these goals, the spacecraft was equipped with an X-ray/gamma-ray spectrometer, a near-infrared imaging spectrograph, a multi-spectral camera fitted with a CCD imaging detector, a laser rangefinder, and a magnetometer. A radio science experiment was also performed using the NEAR tracking system to estimate the gravity field of the asteroid. The total mass of the instruments was 56 kg (123 lb), requiring 80 watts of power.

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Applied Physics Laboratory in the context of New Horizons

New Horizons is an interplanetary space probe launched as a part of NASA's New Frontiers program. It was launched in 2006, becoming the first spacecraft to perform a flyby study of the Pluto system in 2015. A secondary mission contained a flyby and study of one or more other Kuiper belt objects (KBOs) in the decade to follow, where it flew past 486958 Arrokoth in 2019. It was the first space probe to ever take high-resolution photographs of Pluto in 2015.

It was engineered by the Johns Hopkins University Applied Physics Laboratory (APL) and the Southwest Research Institute (SwRI), with a team led by Alan Stern. New Horizons is the fifth space probe to achieve the escape velocity needed to leave the Solar System.

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Applied Physics Laboratory in the context of Tomahawk (missile family)

The BGM-109 Tomahawk Land Attack Missile (TLAM) is an American long-range, all-weather, jet-powered, subsonic cruise missile that is used by the United States Navy, Royal Australian Navy, Royal Netherlands Navy and Royal Navy in ship and submarine-based land-attack operations.

Developed at the Applied Physics Laboratory of Johns Hopkins University under James H. Walker near Laurel, Maryland, the Tomahawk emerged in the 1970s as a modular cruise missile first manufactured by General Dynamics. Early tests of the missile took place between 1983 and 1993, during which time 23 cruise missiles were tested over northern Canada under the "Canada–U.S. Test and Evaluation Program". The goal of the program was to simulate the climate and terrain similar to that of the northern Soviet Union, and to allow the North American Aerospace Defence Command (NORAD) to develop an anti-cruise capability. The Tomahawk aimed to fulfill the need for a medium- to long-range, low-altitude missile with diverse capabilities. Its modular design allows for compatibility with a range of warheads, including high-explosive, submunitions, and bunker-busters. The Tomahawk can use a variety of guidance systems, including GPS, inertial navigation, and terrain contour matching. Over a dozen variants and upgraded versions have been developed since the original design, including air-, sub-, and ground-launched configurations with both conventional and nuclear armaments. The Tomahawk's manufacturing history has seen several transitions. General Dynamics served as the sole supplier in the 1970s. From 1992 until 1994, McDonnell Douglas was the sole supplier of Tomahawks, producing Block II and Block III versions and remanufacturing many Tomahawks to Block III specifications. In 1994, Hughes Aircraft, having purchased General Dynamics' missile division in 1992, outbid McDonnell Douglas to become the sole supplier of Tomahawks. A joint venture between Hughes and Raytheon manufactured the missile from 1995 until Raytheon's acquisition of Hughes in 1997, solidifying their position as the sole supplier. In 2016, the US Department of Defense purchased 149 Tomahawk Block IV missiles for $202.3 million. As of 2024, Raytheon remains the sole manufacturer of non-nuclear, sea-launched Tomahawk variants.

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