A Radio telescope consists of a radio receiver and an antenna system that is used to detect radio-frequency radiation emitted by extraterrestrial sources. Because radio wavelengths are much longer than those of visible light, radio telescopes must be very large in order to attain the resolution of optical telescopes.

Freud - On My Mind
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Psychology is the science of human behavior, the mind, and mental processes in humans and animals as they interact with each other and the environment. As a practice, psychologists focus on diagnosing, assessing, and delivering preventive and therapeutic services directly to individuals.

In academic settings, psychology has grown to be one of the most widely chosen areas of undergraduate study. Areas of specialty include personality, group interaction, physiology and behavior, intelligence and memory, emotion, sensation and perception, genetics, and states of consciousness and the abnormal development and treatment of these processes.

One of the main quests of science throughout the ages has been to discover what matter is made of - and what holds it together. All matter is made out of many tiny particles called atoms. The study of how these atoms interact is called chemistry. Modern physics has discovered how atoms are made up of smaller particles and how these particles interact to build atoms into molecules and larger objects of matter.

Our nearest neighbor in space, the Moon is the only natural satellite of the Earth. Apart from the Sun, it is the brightest object in the sky. It is 384,400 kilometers from Earth and has a diameter of 3,476 kilometers. Great plains stretch over the moon's surface, dotted with huge mountains and scarred by numerous craters.

The solar system consists of the Sun; the eight planets, 165 satellites of the planets, 5 dwarf planets, a large number of Small Solar System Bodies (including comets and asteroids), and the interplanetary medium. A planet is any of the eight major celestial bodies. The inner solar system contains the Sun, Mercury, Venus, Earth and Mars; The planets of the outer solar system are Jupiter, Saturn, Uranus, and Neptune.

Generally, a computer is any electronic data-processing device that performs tasks, such as mathematical calculations or electronic communication, under the control of a set of instructions called a program. Programs usually reside within the computer's main memory and are retrieved and processed by the computer's electronics, and the program results are stored or routed to output devices, such as video display monitors or printers.

Physics is the science of Nature in the broadest sense. Physicists study the behaviour and interactions of matter and energy, which are referred to as physical phenomena. Physics is the study of matter, energy, motion, and forces. Physics is a major branch of science, concerned with the fundamental components of the universe, the forces they exert on one another, and the results produced by these forces.