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Chandra is an Earth satellite in a 64-hour orbit, and its mission is ongoing as of 2025. Chandra is one of the Great Observatories, along with the Hubble Space Telescope, Compton Gamma Ray Observatory (1991–2000), and the Spitzer Space Telescope (2003–2020).
So far, Chandra has taken nearly 25,000 observations of the universe. The telescope observes the cosmos through X-ray light, which is invisible to the human eye.
The discovery was made using NASA's space telescope, the Chandra X-ray Observatory, as well as optical ground-based telescopes like the Very Large Telescope in Chile.
The Himalayan Chandra Telescope is a 2.01-metre (79 in) optical-infrared telescope named after India-born Nobel laureate Subrahmanyam Chandrasekhar. [3] It contains a modified Ritchey-Chretien system with a primary mirror made of ULE ceramic which is designed to withstand low temperatures it experiences. [12]
In the meantime, in 1978, NASA launched the first imaging X-ray telescope, Einstein Observatory (HEAO-2), into orbit. Work continued on the Chandra project through the 1980s and 1990s. In 1992, to reduce costs, the spacecraft was redesigned. Four of the twelve planned mirrors were eliminated, as were two of the six scientific instruments.
The Great Observatories Origins Deep Survey, or GOODS, is an astronomical survey combining deep observations from three of NASA's Great Observatories: the Hubble Space Telescope, the Spitzer Space Telescope, and the Chandra X-ray Observatory, along with data from other space-based telescopes, such as XMM Newton, and some of the world's most powerful ground-based telescopes.
Chandra X-ray Observatory, launched by NASA in 1999, is still operational as of 2024 An X-ray telescope ( XRT ) is a telescope that is designed to observe remote objects in the X-ray spectrum. X-rays are absorbed by the Earth's atmosphere , so instruments to detect X-rays must be taken to high altitude by balloons , sounding rockets , and ...
The Chandra Astrophysics Institute (CAI) is a program offered for high school students who are interested in astrophysics mentored by MIT scientists [45] and sponsored by the Chandra X-ray Observatory. [46] Carl Sagan praised him in the book The Demon-Haunted World: "I discovered what true mathematical elegance is from Subrahmanyan Chandrasekhar."