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How old is our universe? What are light minutes or hours? How did the universe begin? What is the temperature of our Universe? BACK.

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Presentation on theme: "How old is our universe? What are light minutes or hours? How did the universe begin? What is the temperature of our Universe? BACK."— Presentation transcript:



3 How old is our universe? What are light minutes or hours? How did the universe begin? What is the temperature of our Universe? BACK

4 Most astronomers believe that the universe was created when the big band created. The astronomers estimated that the Big Bang occurred between 12 and 14 billion years ago. BACK

5 Most astronomer s believe that our universe was created by a theory called a Big Bang. BACK

6 20 to 40 seconds after the big bang the temperature drooped to 10 to degrees. BACK

7 Light minuets and light hours are how far light travel. Say if you shine a torch up towards space, it would travel approximately 18,000,000km, so that means it will travel about 1,079,252,848.8 km an hour. BACK

8 How did early astronomers study the stars before the invention of the telescope? What was the first telescope invented? What are radio telescopes? Galileo Galilei Clyde William Tombaugh BACK

9 They studied the wavelengths of the stars. How did early astronomers study the stars before the invention of the telescope? BACK

10 Dutch lens-maker Hans Lipperhey discovers that a distant object appears to be much closer when viewed through a concave and convex lens held in front of each other, and invents the first telescope. BACK

11 instrument for studying radio wave sources: an astronomical instrument used to detect and analyse radio waves from astronomical objects. It consists of an antenna, often in the form of a large dish and a detector. BACK

12 Lives in: What did he discover: Tombaugh is best known for discovering the dwarf planet Pluto in 1930, but also discovered many asteroids, and called for serious scientific research of unidentified flying objects. Clyde William Tombaugh (February 4, 1906 – January 17, 1997) was an American astronomer. America BACK

13 Galilean discovered 63 moons, including the four large moons called the Galilean moons that were first discovered in 1610. What did he discover: Lived in: Itialy BACK

14 What is a Star? How dose a new star begin? What is a constellation? How long would it take to travel to the nearest star? What is the Milky Way? Do stars really twinkle and if so, how is it caused? What are shooting stars? BACK

15 A star is a massive, luminous ball of plasma that is held together by gravity. The nearest star to Earth is the Sun, which is the source of most of the energy on Earth. Other stars are visible in the night sky, when they are not outshone by the Sun. BACK

16 New stars are formed from old stars witch have died or exploded have become star dust. BACK

17 A group of stars visible from Earth that forms a distinctive pattern and has a name, often derived from Greek mythology, linked to its shape. There are 88 constellations and the groupings are historical rather than scientific. BACK

18 Around about 190 years but no one is really sure. BACK

19 On a clear, dark night, our eyes can see about 6,000 or so stars in the sky. They seem to twinkle, or change their brightness, all the time. In fact, most of the stars are shining with a steady light. The movement of air (sometimes called turbulence) in the atmosphere of Earth causes the starlight to get slightly bent as it travels from the distant star through the atmosphere down to us on the ground. This means that some of the light reaches us directly and some gets bent slightly away. To our eyes, this makes the star seem to twinkle. BACK

20 The Milky Way, or simply the Galaxy, is the galaxy in which the Solar System is located. It is a barred spiral galaxy that is part of the Local Group of galaxies. It is one of billions of galaxies in the observable universe. BACK

21 A "falling star" or a "shooting star" has nothing at all to do with a star! These amazing streaks of light you can sometimes see in the night sky are caused by tiny bits of dust and rock called meteoroids falling into the Earth's atmosphere and burning up. The short-lived trail of light the burning meteoroid produces is called a meteor. Meteors are commonly called falling stars or shooting stars. If any part of the meteoroid survives burning up and actually hits the Earth, that remaining bit is then called a meteorite. BACK


23 A white dwarf is what stars like our Sun become after they have exhausted their nuclear fuel. A white dwarf, also called a degenerate dwarf. They are very dense; a white dwarf's mass is comparable to that of the Sun and its volume is comparable to that of the Earth. BACK

24 Binary Star, two stars that are bound to each other by gravity and orbit about a common centre of mass. Binary star systems are quite common and the pairing of stars appears to be random in most cases. Astronomers estimate that approximately one-fourth of the visible stars belong to a binary system. The time it takes for one star to orbit the other can range from hours to centuries depending on the distance between the two stars and their masses. BACK

25 Supernova, violent explosion that occurs when a large star uses up its supply of fuel, collapses under its own weight, and explodes. A shock wave from this catastrophic event expands into space, followed by a shell of material from the star’s atmosphere. The material blown off contains chemical elements created throughout the star’s life time. BACK

26 A neutron star is about 20 km long and has the weight of about 1.4 times of your sun. On earth, 1 teaspoon full of neutron star, would weight 1 billon tons. BACK

27 A Nebulae is made out of cloud, dust, hydrogen, gas, helium and plasma. Originally Nebulae was a name for things beyond the Milky way for example the Andromeda galaxy was called Andromeda Nebulae. If I had to describe Nebulae I would describe it as a huge cloud only with more colours and is out in space. A planetary nebula forms when Sun-like stars gently eject their outer gaseous layers that form bright nebulae with amazing and confounding shapes. BACK

28 It was described that a black hole is a region of space in which the attraction force is so powerful than nothing can escape its pull after having fallen past its event horizon, including the mass-less electromagnetic radiation. The Black Hole is in the middle of the Milky way. BACK

29 When the star has run out of hydrogen fuel to fuse into helium within its core the core will begin to collapse and heat some more. To answer the core's collapse the outer envelope expands causing the temperature to drop at the surface but also increasing surface area and thereby the light of the star. Within the core temperatures will rise to begin fusion of helium into carbon. A shell around the core will rise to such a temperature as to ignite further hydrogen fusion in that region of the star. The helium produced falls onto the core where it can be used as fuel. This time in the life of a Red Giant is very short compared to the main sequence lifetime, only a few million years. BACK

30 A globular cluster is a collection of stars that orbits the middle of them. Globular clusters are very tightly put together by gravity, which gives them their circular shapes. BACK


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