INTERACTIVE: This gold-plated, alien-hunting space telescope is about to begin a journey that could reveal some of the universe's most enduring mysteries and take us billions of years back in time. Here's how it'll work and why it’s so significant →
Is there life on other planets? How did the first stars form? What happened in the turbulent early days of the universe?After more than three decades of development, the tennis court-sized observatory is set to launch into orbit around the sun this month. It will be able to see deeper into space and in greater detail than any space or ground-based telescope to date.
Some 40 million hours of work by thousands of scientists and engineers across three space agencies have gone into building the Webb telescope. And now, it is finally ready to come online.Billed as the successor to the Hubble Space Telescope, the $10 billion Webb observatory is the largest and most powerful space telescope built to date.Fully extended, it’s about the length of a tennis court.
Each gold-coated segment has been constructed to be perfectly aligned to focus and function as a single unit. And to do so properly, the mirror needs to be superchilled to cryogenic temperatures — cooler than minus 370 degrees Fahrenheit.
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