Why was the James Webb Telescope launched?
To study the universe in infrared light, observing the first galaxies, star formation, exoplanets, and the origins of the universe with unprecedented detail and clarity.
Where is the James Webb Telescope located?
It orbits the Sun at the second Sun-Earth Lagrangian point (L2), approximately 1.5 million kilometers (930,000 miles) from Earth, ensuring a stable, cold environment.
What is a key difference between Webb and Hubble?
Webb primarily observes in infrared light, allowing it to see through dust and gas clouds and detect the faint, stretched light from the early universe. Hubble observes mainly in visible and ultraviolet light.
How large is Webb's primary mirror?
Webb's primary mirror is 6.5 meters (21 feet) in diameter, making it the largest ever launched into space. It consists of 18 hexagonal beryllium segments.
Why does Webb need a sunshield?
Webb needs a sunshield to keep its instruments extremely cold, around -233 degrees Celsius (-388 Fahrenheit). This prevents its own heat from interfering with sensitive infrared observations.
When was the James Webb Telescope launched?
The James Webb Space Telescope was launched on December 25, 2021, from Europe's Spaceport in French Guiana, aboard an Ariane 5 rocket.
Can Webb study exoplanets?
Yes, Webb can study exoplanets by analyzing their atmospheres for signs of water, methane, and other biosignatures, helping scientists understand their potential for life and habitability.
What kind of images does Webb produce?
Webb produces stunning, high-resolution infrared images of distant galaxies, nebulae, star-forming regions, and exoplanet atmospheres, revealing previously unseen cosmic details and phenomena.
How long is Webb expected to operate?
Webb is expected to operate for at least 5-10 years, with its operational lifetime potentially extending much longer depending on fuel consumption for station-keeping maneuvers.
What was the estimated cost of the James Webb Telescope?
The estimated total cost of the James Webb Space Telescope project, including development, launch, and initial operations, is around $10 billion over its lifetime.
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