Universe

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MYSTERIOUS UNIVERSE

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The universe Move to next list Page

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Astronomy, study of the universe and the celestial bodies, gas, and dust within it. Astronomy includes observations and theories about the stars, the galaxies, and the general structure of space. Astronomy also includes cosmology, the study of the universe and its past and future. People who study astronomy are called astronomers Horsehead Nebula

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ASTRONOMY

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Hubble Space Telescope TYPES OF ASTRONOMY Until the 20th century, all observational astronomers studied the visible light that astronomical objects emit and were known as Optical Astronomer. Instead, a telescope sends an object’s light to an electronic light-sensitive computer chip called a CCD . Optical Astronomy Refracting Telescope Reflecting Telescope

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Gamma-Ray Telescope Gamma and X – Rays Astronomy X-Ray Telescope Gamma rays have the shortest wavelengths. Special telescopes in orbit around Earth, such as the National Aeronautics and Space Administration’s (NASA’s) Compton Gamma-Ray Observatory. Gather gamma rays before Earth’s atmosphere absorbs them.

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Ultraviolet light has wavelengths longer than X rays, but shorter than visible light. Ultraviolet telescopes are similar to visible-light telescopes in the way they gather light. Instruments on the Hubble Space Telescope (HST) are sensitive to ultraviolet radiation. Ultraviolet Astronomy Ozone Layer Hole

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Infrared astronomers study parts of the infrared spectrum, which consists of electromagnetic waves . Earth’s atmosphere absorbs infrared radiation, so astronomers must collect infrared radiation from places where the atmosphere is very thin. Infrared Telescope Infrared Astronomy

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The universe I. Black Holes and Stars II. Big Bang and the HALO III. Galaxies IV. Future – BIG CRUNCH Move to next list Page

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Background Radiation Big Bang Theory, gives explanation of the beginning of the universe. It proposes that the universe was once extremely compact and hot. A cosmic explosion called the big bang, occurred about 13.7 billion years ago, since then the universe has been expanding and cooling Big Bang Theory

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A cosmic explosion called the big bang, occurred about 13.7 billion years ago, and the universe has since been expanding and cooling. Scientists can now model the universe back to 10-43 seconds after the big bang.

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World's largest and highest-energy particle accelerator named the LHC. 27-km long tunnel , two adjacent parallel beam pipes each containing 2 Proton beams, some accelerating structures and 27 tones of magnets make it the largest experiment ever. Located at the depth of 50-175 meters underground and being operated in C.E.R.N lab, Geneva, Switzerland making it more special. LHC

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Beams of protons are fired in opposite direction, closer to the speed of light with the aim of smashing together to get what happened just at the time of big bang. A magnetic field is created by superconducting electromagnets is used to keep the beams focused.

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GALAXIES

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Astronomers study galaxies to learn about the structure of the universe. Galaxies are huge collections of billions of stars. Our Sun is part of the Milky Way Galaxy. Galaxies also contain dark strips of dust and may contain huge black holes at their centers. Galaxies exist in different shapes and sizes. Some galaxies are spirals, some are oval, or elliptical, and some are irregular. The Milky Way is a spiral galaxy. Galaxies tend to group together in clusters.

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Big Crunch is one possible scenario for the ultimate fate of the universe, in which the metric expansion of space eventually reverses and the universe recollapses , ultimately ending as a black hole singularity Big Crunch –future of universe

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2. PLANETS The universe PLANETS I. Mercury II. Venus III. Earth IV. Mars V. Jupiter VI. Saturn VII. Uranus VIII.Neptune Move to next list Page SUN

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Planets in Our Solar System

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Uranus Uranus’s blue-green color comes from the methane gas present in its cold, clear atmosphere. Scientists compiled this view of Uranus from images returned from Voyager 2 in 1986, when the probe was 9.1 million km (5.7 million mi) away from the planet.

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This image of Neptune, taken by the Voyager 2 spacecraft, shows the planet’s most prominent features. The large, dark oval surrounded by white clouds near the planet’s equator is the Great Dark Spot, a storm similar to Jupiter’s Great Red Spot known as Dark Spot 2. Neptune

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COMETS The universe ASTEROIDS AND METEORITES END OF OUR EARTH

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COMETS

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A comet is a small Solar System body that orbits the Sun and, when close enough to the Sun, exhibits a visible coma (atmosphere) or a tail — both primarily from the effects of solar radiation upon the comet's nucleus. Comet nuclei are themselves loose collections of ice, dust and small rocky particles, measuring a few kilometres or tens of kilometres across. COMET HYATUKE COMETS

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ASTEROIDS AND METEORITES A meteorite is a natural object originating in outer space that survives an impact with the Earth's surface. While in space it is called a meteoroid. Asteroids, sometimes called minor planets or planetoids, that are smaller than planets but larger than meteoroids, with the exception of comets.

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END OF US

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Created by- Abhishek Singh and Aditya Malhotra Created by- Abhishek Singh and Aditya Malhotra Created by- Abhishek Singh and Aditya Malhotra