Hubble Space Telescope

The Hubble Space Telescope (HST) is one of the most iconic and influential telescopes ever launched into space. Operated by NASA and the European Space Agency (ESA), Hubble was launched on April 24, 1990, and remains in operation to this day. Here are some key facts about the Hubble Space Telescope:

1. Namesake: The telescope is named after the American astronomer Edwin Hubble, who made significant contributions to our understanding of the universe and the expansion of space.

2. Orbit: Hubble is in low Earth orbit at an altitude of about 547 kilometers (340 miles). It completes an orbit around Earth approximately every 97 minutes.

3. Size and Weight: Hubble is about 13.2 meters (43 feet) long and weighs approximately 11,110 kilograms (24,500 pounds), roughly the size of a school bus.

4. Optical System: The primary mirror of the telescope is 2.4 meters (7.9 feet) in diameter, and it collects visible and ultraviolet light from celestial objects.

5. Instruments: Hubble is equipped with several scientific instruments that allow astronomers to observe distant galaxies, stars, planets, and other celestial phenomena. These instruments include cameras, spectrographs, and other specialized devices.

6. Repair and Upgrades: Hubble has been serviced and upgraded several times by Space Shuttle crews. These servicing missions have extended its lifespan and improved its capabilities.

7. Discoveries: Hubble has made numerous groundbreaking discoveries and observations, including the measurement of the expansion rate of the universe (Hubble's Law), the existence of dark energy, and the discovery of distant galaxies and exoplanets.

8. Images: One of Hubble's most significant contributions is its breathtaking images of distant galaxies, nebulae, star clusters, and other astronomical objects. These images have captured the public's imagination and provided valuable data for scientific research.

9. Public Outreach: Hubble's captivating images have not only advanced scientific knowledge but also inspired the public's interest in space exploration and astronomy.

10. Future: While Hubble has been operating for over three decades, it is expected to eventually reach the end of its operational life. NASA and ESA are planning its successor, the James Webb Space Telescope (JWST), which is scheduled to be launched in late 2021.

The Hubble Space Telescope has revolutionized our understanding of the universe, and its scientific contributions and stunning images have had a profound impact on both scientific research and public appreciation of space. It continues to be an invaluable tool for astronomers and space enthusiasts worldwide.