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Galaxies Over Time
The Star Lifecycle
The Webb Mission
Science News Releases
Mission & Launch Quick Facts
Telescope Quick Facts
Science Quick Facts
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What Were the First Stars Like?
Short answer: We don’t really know.
How Does Webb See Back in Time?
Looking out in space is like looking back in time.
Fast facts about the James Webb Space Telescope
Webb's Big Chill
An infrared telescope comes with an inherent design problem—it gives off heat. To capture infrared light from cosmic objects, the James Webb Space Telescope will have to be kept as cold as possible.
The Incredible Expanding Telescope
The bigger the telescope, the better its vision.
How Do Planets Get Water?
The Webb telescope will trace the origins of water in developing planetary systems.
What Did the Young Universe Look Like?
The era of the universe called the Dark Ages is as mysterious as its name implies.
Doors to the Universe
Think how much more productive you could be if you could study a book, check your computer, watch the television, and consult a newspaper all at once.
Who Is James Webb?
Second administrator of the National Aeronautics and Space Administration, 1961–1968
Is the Milky Way Unique?
It is just one of billions of galaxies, but the Milky Way is our galaxy, our home in the universe.
What Are Atmospheres Like on Other Planets?
Examining planetary systems and the origin of life is one of the James Webb Space Telescope's core goals.
Webb's Science Tools
Each instrument has unique features that will allow astronomers to study a variety of astronomical objects in different ways.
Why Do Planets Have Rings?
Though we think of rings as being passive, decorative elements to a planet, they're actually more like an extra-planetary surface.
How Earth-like Are Exoplanets?
The Webb telescope will look for answers within the disks of dust and gas that surround many young stars in our galaxy.
Dwarfing the Giants
What Makes Brown Dwarfs Unique?