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Radio Objects with Continuous Optical Spectra, (abbr. ROCOS, also referred to as ROCOSes) is a group of about 80 astrophysical objects characterized by optical spectra anomalously devoid of emission or absorption features, which makes it impossible to determine their distances and locations in relation to our galaxy.
Radio waves are emitted by planets in our solar system, chemicals in comets and in the Milky Way Galaxy, supernovae, and by other galaxies and distant quasars. These radio waves travel through space just like light, and radio telescopes can intercept them. Astronomers often convert these signals into pictures.
A radio telescope is simply a telescope that is designed to receive radio waves from space. One or more antennas to collect the incoming radio waves. Most antennas are parabolic dishes that reflect the radio waves to a receiver, in the same way as a curved mirror can focus visible light to a point.
Answer: Radio telescopes are just like optical telescopes in that the parts of these telescopes that produce images are actually the detectors that are placed at the focal point.
Radio astronomy is a subfield of astronomy that studies celestial objects at radio frequencies. These include stars and galaxies, as well as entirely new classes of objects, such as radio galaxies, quasars, pulsars, and masers.
Radio source. Radio source, in astronomy, any of various objects in the universe that emit relatively large amounts of radio waves. Nearly all types of astronomical objects give off some radio radiation, but the strongest sources of such emissions include pulsars, certain nebulas, quasars, and radio galaxies.
Radio waves can be generated by natural sources such as lightning or astronomical phenomena. or by artificial sources such as broadcast radio towers, cell phones, satellites and radar.
Like all other electromagnetic waves, radio waves travel at the speed of light in vacuum. They are generated by electric charges undergoing acceleration, such as time varying electric currents. Radio waves are generated artificially by transmitters and received by radio receivers, using antennas.
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