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In 1967, Jocelyn Bell Burnell and Antony Hewish discovered pulsars, which are rapidly rotating, highly magnetized neutron stars emitting beams of electromagnetic radiation. This discovery was fundamental in the study of stellar evolution and compact objects in the universe.

Large radio telescopes are often used in conjunction with NASA's Deep Space Network to track and communicate with spacecraft. This application expands the role of radio astronomy into the field of space exploration.

Fast Radio Bursts, extremely powerful and brief flashes of radio waves of unknown origin, were first discovered in 2007. Their study may lead to significant breakthroughs in understanding the Universe's extremes.

The establishment of the first radio astronomy observatories in the late 1940s and 1950s, like Jodrell Bank and Green Bank, signaled the institutionalization of radio astronomy and enabled long-term research projects.

By observing the distribution of neutral hydrogen through its 21 cm emissions, radio astronomy has helped measure the Universe's large-scale structure, such as filaments and voids, which are essential for understanding cosmic evolution.

The international Square Kilometre Array project, begun in the 21st century, aims to build the world's largest radio telescope, with a total collecting area of one square kilometre. It will be a leap forward in sensitivity and resolution for radio astronomy.

Radio telescopes have enabled astronomers to detect the first extra-solar planetary systems by observing variations in the timing of pulsar emissions, a method complementary to other techniques such as the transit and radial velocity methods.

Karl Jansky built the first radio telescope in 1932, which allowed him to detect radio waves from space. This invention marked the birth of radio astronomy as a field and enabled astronomers to observe astronomical phenomena that are invisible to optical telescopes.

The 1950s saw the completion of the first radio surveys of the sky, particularly the Cambridge catalogs, which revealed diverse radio sources and laid the groundwork for future research in identifying these sources as galaxies, quasars, and other celestial objects.

The Sunyaev-Zel'dovich effect, a distortion of the Cosmic Microwave Background Radiation by hot gas in galaxy clusters, was first observed using radio telescopes. This discovery has become a tool for studying the properties of galaxy clusters.

In 1964, Arno Penzias and Robert Wilson accidentally discovered the Cosmic Microwave Background Radiation, which is a relic radiation from the Big Bang. This discovery provided strong evidence for the Big Bang Theory and greatly advanced our understanding of the origins of the Universe.

In 1982, the discovery of the first millisecond pulsar, PSR B1937+21, provided new insights into neutron star physics. Millisecond pulsars rotate hundreds of times per second, offering precise timing measurements for various applications.

Using the 21 cm hydrogen line, astronomers have mapped the distribution of hydrogen gas in the Milky Way. This spectral line, associated with the hyperfine transition of hydrogen atoms, has been key in understanding the structure of our galaxy.

Improvements in radio technology during the 1960s led to Very Long Baseline Interferometry, a technique that links radio telescopes worldwide to create a virtual telescope with a diameter equal to the distance between the telescopes, greatly enhancing image resolution.

In 1992, radio astronomers Aleksander Wolszczan and Dale Frail discovered two planets orbiting the pulsar PSR B1257+12. This marked the first confirmed detection of exoplanets, expanding our search for planets beyond our Solar System.

In 1963, Maarten Schmidt identified the first quasar, 3C 273, using its radio signature and a subsequent optical observation. Quasars were found to be extremely luminous and distant objects, providing insight into the early Universe.

In 2019, the Event Horizon Telescope collaboration released the first image of a black hole, located in the center of the galaxy M87. This image confirmed many theoretical predictions and was a milestone for radio astronomy and our understanding of gravity.

In the years following Karl Jansky's discovery, Grote Reber confirmed that stars could be radio sources, detecting radio emissions from Cygnus A, which marked the identification of the first radio star, enhancing our knowledge of stellar emissions.

The Very Large Array (VLA) in New Mexico was commissioned in 1980, consisting of 27 independently movable radio antennas. It became one of the world's most versatile and widely used radio telescopes.