What are the 4 great observatories?

The four great observatories are four space-based astronomical observatories which were launched and placed in orbit during the late twentieth century. These observatories are used to observe and study various parts of the universe, from galaxies and stars to black holes and quasars. They are operated by NASA and the European Space Agency (ESA).

The first of the four great observatories is the Hubble Space Telescope. This telescope was launched in April 1990 and is placed in an orbit around the Earth. Its primary mission is to observe the universe in the visible and near-ultraviolet part of the spectrum. It has been responsible for some of the most important astronomical discoveries in recent years, such as the age of the universe and the existence of black holes.

The second of the four observatories is the Chandra X-ray Observatory. This observatory was launched in 1999 and is placed in an orbit around the Earth. Its mission is to observe the universe in the X-ray portion of the spectrum, and it has been used to study various objects such as distant galaxies, supernovas, and black holes.

The third observatory is the Compton Gamma Ray Observatory. This observatory was launched in 1991 and is placed in an orbit around the Earth. Its mission is to observe the universe in the gamma ray portion of the spectrum, and it has been used to study various objects such as high energy phenomena, black holes, and active galactic nuclei.

The fourth observatory is the Spitzer Space Telescope. This observatory was launched in 2003 and is placed in an orbit around the Earth. Its mission is to observe the universe in the infrared portion of the spectrum, and it has been used to study various objects such as star-forming regions, galaxies, and quasars.

These four great observatories were launched and placed in orbit during the late twentieth century, and are used to observe and study various parts of the universe. They have been instrumental in helping us learn more about our universe and the objects within it.

Exploring the 4 Great Observatories of the Universe

Exploring the 4 great observatories of the universe is a fascination for many astronomers and astronomy enthusiasts worldwide. There are four great observatories in the universe that allow us to observe distant stars and galaxies in unprecedented detail, and they form an integral part of our understanding of the cosmos. In this article we will explore the four great observatories in the universe and what makes them so special.

The four great observatories of the universe are the Hubble Space Telescope (HST), the Chandra X-ray Observatory (CXO), the Spitzer Space Telescope (SST) and the Compton Gamma Ray Observatory (CGRO). The Hubble Space Telescope is a 2.4-meter optical telescope launched in 1990, and is the most famous of the four. It has provided us with unparalleled views of the cosmos, revealing distant galaxies and their structures, and has revolutionized our understanding of the universe. The Chandra X-ray Observatory, launched in 1999, is a powerful X-ray telescope that allows us to see high-energy events such as supernovae and quasars. The Spitzer Space Telescope, launched in 2003, is an infrared telescope that allows us to view star formation and interstellar dust in the universe. The Compton Gamma Ray Observatory, launched in 1991, is a gamma-ray telescope that allows us to study black holes, neutron stars, and other exotic objects.

Each observatory has its own set of features that make it unique and powerful. For instance, the Hubble Space Telescope has a 2.4-meter primary mirror, which allows it to observe objects that are over 10 billion light years away. The Chandra X-ray Observatory has four X-ray mirrors that can detect X-ray sources with a sensitivity that is 1000 times greater than any previous observatory. The Spitzer Space Telescope has an 85 cm aperture and can detect infrared radiation from space at wavelengths up to 200 microns. The Compton Gamma Ray Observatory has the largest gamma-ray detector ever constructed, with its 4.8-meter main mirror.

The cost of these observatories ranges from tens of millions of dollars to over 1 billion dollars. For example, the Hubble Space Telescope cost an estimated 2.1 billion dollars, while the Chandra X-ray Observatory cost an estimated 1.2 billion dollars. The Spitzer Space Telescope cost an estimated 747 million dollars, while the Compton Gamma Ray Observatory cost an estimated 650 million dollars.

The four great observatories of the universe are truly remarkable and have enabled us to explore the depths of space like never before. We are now able to observe galaxies that were previously invisible, and explore the structure and dynamics of the universe in extraordinary detail. These four great observatories are essential for our understanding of

A Closer Look at the 4 NASA Great Observatories

NASA’s Great Observatories Program is a series of four space-based telescopes that have been used for deep sky observation and exploration. The four Great Observatories are the Hubble Space Telescope, the Chandra X-Ray Observatory, the Spitzer Space Telescope, and the Compton Gamma-Ray Observatory. Each of these space-based observatories has its own unique capabilities, allowing astronomers to look deep into the universe and observe phenomena that cannot be seen with Earth-based instruments.

The Hubble Space Telescope is the most famous of the Great Observatories, and it is the most powerful and versatile of the four. This telescope was launched in 1990 and was the first of the series. It is used to observe distant galaxies, stars, and other celestial bodies. The Hubble Space Telescope has an angular resolution of 0.1 arcseconds, which is the equivalent of seeing a pair of fireflies in Tokyo from Los Angeles. Hubble is also capable of resolving objects as small as a human hair at a distance of one hundred miles.

The Chandra X-Ray Observatory was launched in 1999 and is the second of the Great Observatories. Chandra is a space-based X-ray observatory that can detect and observe the X-ray emissions from hot gas in clusters of galaxies and other cosmic sources. It has an angular resolution of 0.5 arcseconds, which is the equivalent of seeing a dime from a distance of two miles. Chandra is capable of resolving objects as small as a housefly at a distance of one hundred miles.

The Spitzer Space Telescope was launched in 2003 and is the third of the Great Observatories. Spitzer is an infrared space-based telescope that can detect and observe the infrared emissions from distant galaxies, stars, and other cosmic sources. It has an angular resolution of 1.5 arcseconds, which is the equivalent of seeing a penny from a distance of three miles. Spitzer is capable of resolving objects as small as a dust particle at a distance of one hundred miles.

The Compton Gamma-Ray Observatory was launched in 1991 and is the fourth of the Great Observatories. Compton is a space-based gamma-ray observatory that can detect and observe the gamma-ray emissions from distant galaxies, stars, and other cosmic sources. It has an angular resolution of 3.0 arcseconds, which is the equivalent of seeing a pinhead from a distance of six miles. Compton is capable of resolving objects as small as an atom at a distance of one hundred miles.

The four Great Observatories have each made important contributions to our knowledge of the universe and our understanding of the cosmos. By using the power of these observatories, astronomers have been able to uncover new phenomena, explore new regions of the universe, and observe distant galaxies, stars, and other cosmic sources. With the ability to see even deeper into the universe, the Great Observatories are sure to continue to provide us with new insights and discoveries for many years to come.