The James Webb Telescope and how it will be different from Hubble
The James Webb Telescope, currently being constructed, will replace the Hubble Telescope as the biggest and most powerful in the world when it goes into space in 2021. Its construction has been delayed by four years due to concerns about its weight and budget, but now that it’s back on track and moving forward with full force, it’s time to look at how this telescope will be different from the one it’s replacing. Here are some of the key differences between them and how they’ll affect their uses.
What exactly is the James Webb Telescope?
The James Webb Telescope is a large space telescope, often called a next-generation successor to the NASA/ESA Hubble Space Telescope. The JWST was formerly known as Next Generation Space Telescope (NGST), and before that, as First Light Space Observatory (FLO). It has been under development for at least 15 years.
How can it see objects farther away than Hubble?
To accomplish its goals, Webb’s primary mirror has to have a diameter of 6.5 meters (21 feet). But that is just one factor: The telescope needs to collect enough light to reveal objects three times fainter than those seen by Hubble, but do so over twice as large an area in order to reduce noise.
How big is the James Webb Telescope?
The largest part of the telescope, its 6.5-meter-wide segmented primary mirror, measures 21 feet (6.4 meters) across — more than twice as wide as that of NASA’s famous Hubble Space Telescope. In fact, if you put a person inside it, he or she would fit with room to spare.
Is the JWST mirror glass or plastic?
The most important difference between JWST and HST is its main mirror. Hubble has a relatively small mirror composed of beryllium segments with reflective coatings. The JWST uses a much larger mirror composed of 18 separate segments, every 1.3 meters in diameter (see picture below). It is made of gold-coated beryllium, but that’s where any similarity ends.
What are some interesting facts about the JWST?
The James Webb Space Telescope (JWST) is not just any other observatory. It is an ambitious project that will give space science a major boost in terms of discovery potential. The JWST is not an ordinary telescope, because it has been built to expand what we can observe in infrared light! While our most famous large telescope, Hubble, sees mainly visible light and some ultraviolet light, JWST has been made to see in infrared.
What is the Hubble telescope?
The Hubble telescope is a space-based observatory launched in 1990 that has revolutionized our understanding of the universe. It is able to take very high-resolution images of distant celestial objects. Because of its high resolution, scientists have been able to determine that stars are forming where they’re observing, which had previously been believed impossible without an atmosphere.
What exactly is the Hubble Telescope?
The Hubble Space Telescope is a space telescope that was carried into orbit by a Space Shuttle. It is named after American astronomer Edwin Powell Hubble, who made one of the greatest scientific contributions to astronomy with his work on cosmology. While in orbit, Hubble can be controlled remotely; however, most of its observations are made without human intervention. Hubble's lifespan has been extended several times since its launch in 1990. As of 2017, it is expected to operate until at least 2022.
NICE
You must be logged in to post a comment.