Electromagnetic spectrum universe slides
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Astronomers use different wavelengths of electromagnetic radiation to learn about distant astronomical objects. Visible light provides information about distances and properties in the universe. By analyzing star spectra, astronomers can determine chemical compositions. Radio waves have revealed pulsars and the cosmic microwave background. X-rays from hot gas near black holes indicate their presence. Electromagnetic waves may help discover life on other planets by identifying biomarkers in exoplanet atmospheres.
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Astronomers gather information about space by detecting and analyzing electromagnetic radiation emitted or transmitted from celestial objects. Different types of electromagnetic radiation, including radio waves, visible light, and others, provide data about distances, properties, compositions and motions when collected by telescopes and studied. Spectroscopy techniques separate light into spectra that reveal characteristics of astronomical sources like temperature, density, and chemical makeup through unique spectral patterns.
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2) Telescope types including refracting, reflecting, and non-optical telescopes are explained. The Hubble Space Telescope is given as an example of an orbital telescope.
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How Objects Which Don't Exist Fooled Astronomers
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2) Telescope types including refracting, reflecting, and non-optical telescopes are explained. The Hubble Space Telescope is given as an example of an orbital telescope.
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Radio telescopes use large dish-shaped antennas to detect radio waves from space. They can observe continuously and are often arranged in arrays to increase resolving power. The Very Large Array in New Mexico links signals from 27 dishes. Infrared telescopes observe dark dusty regions through infrared radiation. They must be kept cool to reduce heat interference. Ultraviolet, X-ray, and gamma-ray telescopes detect shorter wavelengths and provide information about energetic astronomical phenomena like young stars, galaxies and catastrophic events. Special coatings and shielding allow observation of these high-energy regions of the spectrum.
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This presentation was made for my 2nd year 2nd term course.
Me and my friend gave this presentation.
We are very much interested in cosmology and space program.
**If you want the script of this presentation leave a message in LinkedIn
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An infrared telescope detects celestial bodies using infrared light. It allows scientists to measure temperatures of planets, stars, and dust, and see past dust clouds. Infrared telescopes function using components like helium, solar shields, and detectors. They have advantages like viewing farther than visible light and penetrating dust clouds, but use large amounts of helium and require detectors that take up space. Examples given are the Spitzer and Hubble telescopes.
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Hubble Telescope
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Universe is ultimate scene of curiosity. I am dreaming of roaming in space to the extremes of Universty edge since I have learnt to see up in the sky. I am naive, stupid and not at all any specialist in Cosmology but these are my basic qualifications to ask questions!
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Radio telescopes can observe planets, detect sun spots, see between stars, and observe energetic objects. They work by collecting radio waves using a parabolic dish and receiver, amplifying the signal, and recording the data. Radio telescopes have advantages over optical telescopes in that they can see further distances, including the other side of the Milky Way, and can observe day or night. Their disadvantages are that they must be very large to be effective and are expensive to build and maintain, requiring super-cooled electronics for precision.
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Light
1. Light travels in straight lines at speeds of 186,000 miles per second from the sun to Earth, where some is absorbed by plants as energy and some warms the atmosphere.
2. Light is a form of electromagnetic radiation that can be described as waves of photons, with properties like wavelength and frequency.
3. Herschel's experiment in 1800 discovered infrared light by finding that a thermometer placed outside the visible spectrum registered the highest temperature.
The James Webb Space Telescope
The James Webb Space Telescope is NASA's next flagship mission. Webb will revolutionize astronomy in the infrared like the Hubble Space Telescope has done for the visible portion of the spectrum over the last 22 years. Webb will reveal the story of the formation of the first starts and galaxies, investigate the processes of planet formation, and trace the origins of life.
Deep space communication
Deep space communication involves transmitting data to and from satellites and spacecraft beyond Earth's atmosphere. It utilizes a global network of antennas to acquire telemetry from spacecraft, transmit commands, and gather science data across vast distances in space. The first deep space communication stations were established in the late 1950s and 1960s to support early US space missions. Today's deep space network, operated by NASA and ESA, employs large radio antennas around the world to communicate with missions throughout the solar system and gain new insights into the wider universe through radio astronomy observations.
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The document then focuses on the history and properties of x-rays, the components and functioning of an x-ray machine, including the x-ray tube, cathode, anode, target, transformers, and power supply. Factors that control the x-ray beam such as exposure time, current and voltage are also summarized.
The Electromagnetic Spectrum 2011
The document discusses the electromagnetic spectrum, describing the characteristics of each type of electromagnetic wave including radio waves, microwaves, infrared light, visible light, ultraviolet waves, X-rays, and gamma rays. It provides information on the frequency and wavelength ranges, what can be learned from each type of wave about Earth and the universe, and examples of NASA missions that utilize each section of the electromagnetic spectrum.
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Electromagnetic spectrum universe slides
- 1. TEKS 8.8C Explore how different wavelengths of the electromagnetic spectrum such as light and radio waves are used to gain information about distances and properties of components in the universe. How Do Astronomers Learn About the Universe? • The stars and other objects in space are very far from Earth. Only a few solar system objects are close enough to be explored with probes. • Astronomers rely on electromagnetic waves to gain information about the universe. • Electromagnetic waves consist of electric and magnetic vibrations that travel through space. (contd.)
- 2. TEKS 8.8C Explore how different wavelengths of the electromagnetic spectrum such as light and radio waves are used to gain information about distances and properties of components in the universe. • The electromagnetic spectrum consists of all the wavelengths of electromagnetic radiation. • The electromagnetic spectrum includes light, radio waves, X-rays, gamma rays, and ultraviolet and infrared radiation.
- 3. TEKS 8.8C Explore how different wavelengths of the electromagnetic spectrum such as light and radio waves are used to gain information about distances and properties of components in the universe. What are Telescopes? • Telescopes are instruments that collect electromagnetic radiation and bring it into focus. • Optical telescopes collect visible light. • Radio telescopes detect radio waves. • The Spitzer Space Telescope captures images in the infrared portion of the spectrum. • The Chandra X-ray Observatory captures images in the X-ray portion of the spectrum. 1. Compare How are all telescopes the same?
- 4. TEKS 8.8C Explore how different wavelengths of the electromagnetic spectrum such as light and radio waves are used to gain information about distances and properties of components in the universe. What Information Can Radio Waves Provide? • Radio waves have provided scientists with valuable information about the universe. • Regular pulses of radio waves from space led astronomers to discover spinning neutron stars called pulsars. • After astronomers detected faint radiation on their radio telescopes coming from all directions, they hypothesized that this cosmic background radiation is the leftover thermal energy from the big bang.
- 5. TEKS 8.8C Explore how different wavelengths of the electromagnetic spectrum such as light and radio waves are used to gain information about distances and properties of components in the universe. What Information Can Visible Light Provide? • Because of the vast distances in the universe, astronomers use the light year to measure distances in space. A light year is the distance light travels in a year. • Astronomers have learned that all known stars, including the sun, have a nearly identical chemical composition. An astronomer analyzing a star or another component of the universe often starts by studying the object’s spectrum. 2. Explain How are astronomers able to determine the chemical composition of stars?
- 6. TEKS 8.8C Explore how different wavelengths of the electromagnetic spectrum such as light and radio waves are used to gain information about distances and properties of components in the universe. What Information Can X-rays Provide? • A black hole is an object with gravity so strong that nothing, not even light, can escape. • No light, radio waves, or any other form of radiation can escape a black hole, so it is not possible to detect black holes directly. • Astronomers detect X-rays coming from hot gas located near a black hole and infer that a black hole is present.
- 7. TEKS 8.8C Explore how different wavelengths of the electromagnetic spectrum such as light and radio waves are used to gain information about distances and properties of components in the universe. What Other Information Might Electromagnetic Waves Provide? • By studying the shift of color of the light from stars, astronomers discovered a planet revolving around an ordinary star like our sun. • Since this first discovery, more than 300 planets have been discovered around other stars. • The discovery of new planets brings up the question of whether there is life in other solar systems. 3. Make a Hypothesis How might electromagnetic waves help scientists discover life on other planets?