telescopes
16 questions tagged telescopes — spanning every one of the seven Ws.
When did the James Webb Space Telescope launch?
The James Webb Space Telescope launched on 25 December 2021.
What is the James Webb Space Telescope?
The James Webb Space Telescope is a large infrared space telescope launched in 2021 to study the early universe, stars, and planets. It is the most powerful space observatory ever sent into orbit at infrared wavelengths.
When was the first telescope specifically designed for infrared astronomy launched into space?
The Infrared Astronomical Satellite, or IRAS, launched on 25 January 1983. It was the first space telescope to survey the sky in infrared wavelengths.
When was the first launch of the James Webb Space Telescope?
James Webb launched on 25 December 2021. It became the most powerful space telescope ever sent into space at that time.
Which space telescope has observed the deepest view of the universe?
The James Webb Space Telescope has produced the deepest infrared views of the early universe. Its images reveal galaxies from more than 13 billion years ago.
Which space telescope has made the deepest infrared view of the early universe?
The James Webb Space Telescope has produced the deepest and most detailed infrared views of the early universe. Its observations can see galaxies that formed less than a billion years after the Big Bang.
Which telescope first produced direct images of an exoplanet?
The Very Large Telescope helped capture some of the first direct images of exoplanets, including the planet 2M1207b. Direct imaging is rare because stars are so much brighter than their planets.
How do space telescopes focus on galaxies without lenses you can touch?
They use precisely shaped mirrors or specialized optics to gather and focus light. In orbit, they avoid much of Earth’s atmospheric distortion, giving them much sharper images.
Where is the largest radio telescope dish in the world?
The largest single-dish radio telescope was the Five-hundred-meter Aperture Spherical Telescope in Guizhou, China. It has a fixed 500-meter-wide reflector.
Which telescope has observed the most distant galaxies so far?
The James Webb Space Telescope has set records for finding some of the most distant confirmed galaxies. It has detected galaxies seen as they were more than 13 billion years ago.
Whose telescope revealed the moons of Jupiter in 1610?
Galileo Galilei’s telescope revealed four large moons orbiting Jupiter. Their discovery showed that not everything in the sky circled Earth.
Why do space telescopes give sharper images than ground telescopes?
They avoid Earth’s atmosphere, which blurs and distorts starlight, so they can observe with much greater clarity.
When was the first galaxy image from the James Webb Space Telescope released?
The first deep-field images from JWST were released on 12 July 2022.
Which telescope has the largest single primary mirror in space?
The James Webb Space Telescope has the largest single primary mirror in space, with a 6.5-meter segmented mirror. It launched in 2021.
Whose observation first showed that the Milky Way is made of countless stars?
Galileo Galilei made the breakthrough with his telescope in 1610. He saw that the Milky Way resolves into innumerable stars.
How do radio telescopes study galaxies that are hidden by dust?
They detect radio waves, which pass through dust much better than visible light. That lets astronomers map gas clouds, star formation, and galactic structure hidden from optical telescopes.