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What Does the Webb Telescope See

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Format: Interactive (Online), Printable (PDF)
Grades: 5678
Subjects: scienceela
Standards: MS-ESS1-1
Languages: English, Spanish

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science,ela

Written by Workybooks TeamPublished by Workybooks

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CONTENT PREVIEW

James Webb Space Telescope Launch (NHQ202112250010) — Arianespace's Ariane 5 rocket launches with NASA’s James Webb Space Telescope onboard, Saturday, Dec. 25, 2021, from the ELA-3 Launch Zone of Europe’s Spaceport at the Guiana Space Centre in Kourou, French Guiana. The James Webb Space Telescope (sometimes called JWST or Webb) is a large infrared telescope with a 21.3 foot (6.5 meter) primarymirror. Image by Bill Ingalls / Wikimedia Commons

The James Webb Space Telescope sees the universe in a completely different way than our eyes can. Webb detects infrared light, which is invisible to humans. This special ability allows Webb to peer through clouds of cosmic dust that block visible light. Scientists observe hidden regions of space where stars are born and galaxies formed billions of years ago.

Infrared light has longer wavelengths than visible light on the electromagnetic spectrum. When light from distant objects travels through space, it stretches and shifts toward the infrared range. Webb's instruments can detect this stretched light from the earliest galaxies. The telescope also captures infrared heat signatures from cool objects like planets and dust clouds. Evidence shows that infrared observation reveals structures that remain invisible to telescopes detecting only visible light.

Webb orbits the Sun at a point called L2, located one million miles from Earth. This position keeps Webb far beyond the Moon's orbit. The telescope's massive mirror measures 21 feet across and consists of 18 gold-coated segments. Gold reflects infrared light very efficiently. A giant sunshield the size of a tennis court protects Webb's instruments from heat. The telescope must stay extremely cold to detect faint infrared signals from space.

Scientists use Webb to study exoplanet atmospheres by analyzing infrared light passing through them. In 2022, Webb detected carbon dioxide in the atmosphere of a gas giant planet 700 light-years away. The telescope has also captured images of star-forming regions in nearby nebulae. Webb's observations of ancient galaxies reveal that large galaxies formed earlier than scientists previously thought. These discoveries can change our understanding of cosmic history.

Webb's infrared vision matters because it allows scientists to answer fundamental questions about the universe. The telescope helps researchers understand how stars and planets form from dust and gas. Webb's ability to analyze exoplanet atmospheres may help identify worlds with conditions suitable for life. By observing the most distant galaxies, scientists learn how the universe evolved over billions of years. Webb's discoveries demonstrate how technology expands human knowledge of Earth's place in the cosmos.

Interesting Fact: The James Webb Space Telescope can detect the heat signature of a bumblebee at the distance of the Moon. This incredible sensitivity allows it to observe extremely faint and distant objects in space.

What type of light does the James Webb Space Telescope detect?

Ultraviolet lightInfrared lightX-ray lightVisible light only

How far from Earth is the Webb telescope located?

100,000 milesOne million milesTen million milesOn the Moon

What does the term 'wavelength' mean in the context of the passage?

The speed at which light travelsThe brightness of lightThe distance between two consecutive peaks of a waveThe color of visible light

Why is Webb's mirror coated with gold?

Gold is the cheapest metal availableGold reflects infrared light very efficientlyGold makes the telescope look beautifulGold protects the mirror from dust

Based on the passage, why can Webb see through cosmic dust when other telescopes cannot?

Webb is closer to the dust cloudsWebb has a larger mirror than other telescopesInfrared light can pass through dust that blocks visible lightWebb uses special filters to remove dust

What discovery did Webb make about exoplanet atmospheres in 2022?

It found oxygen on a nearby planetIt detected carbon dioxide in a gas giant's atmosphereIt discovered water on MarsIt found evidence of alien life

How might Webb's observations change our understanding of the universe?

By showing that galaxies formed earlier than previously thoughtBy proving that Earth is the only planet with lifeBy demonstrating that the universe is shrinkingBy showing that stars never die

If scientists wanted to study how planets form from dust and gas, which telescope feature would be most useful?

Its location near the MoonIts ability to detect infrared light through dust cloudsIts gold-coated mirrorIts large sunshield

The James Webb Space Telescope can only see objects in our solar system.

TrueFalse

Webb must stay extremely cold to detect faint infrared signals from space.

TrueFalse

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This engaging 400-500 word reading passage explores how the James Webb Space Telescope observes the universe using infrared light. Aligned with NGSS standards MS-ESS1-1 and MS-ESS1.Astudents learn about Webb's unique position a million miles from Earth and its ability to peer through cosmic dust to reveal newborn starsancient galaxiesand exoplanet atmospheres. The passage includes audio integration for accessibilitya Spanish translationand a simplified version for English Language Learners. Students will understand how infrared technology allows scientists to observe previously hidden cosmic phenomena and how Webb's discoveries are changing our understanding of universe formation. Vocabulary includes terms like infrared lightelectromagnetic spectrumwavelengthcosmic dustexoplanetatmospheregalaxyand light-year. Activities include comprehension questionswriting promptsand graphic organizers that encourage critical thinking about space observation technology.