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Australian Telescope National Facility Marsfield, Sydney

Australian Telescope National Facility Marsfield, Sydney. Current projects ASKAP. International SKA (Square Kilometre Array). How high would a stack of 15 million ipods be? What area would all of the ipods cover when laid flat?. How high would a stack of 15 million ipods be?

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Australian Telescope National Facility Marsfield, Sydney

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  1. Australian Telescope National Facility Marsfield, Sydney

  2. Current projects ASKAP

  3. International SKA (Square Kilometre Array)

  4. How high would a stack of 15 million ipods be? What area would all of the ipods cover when laid flat?

  5. How high would a stack of 15 million ipods be? 15 000 000 x 0.5 cm 100 000 = 75 km What area would all of the ipods cover when laid flat? Area = 15 000 000 x 11 x 6 1002 = 99 000 m2 (9.9 ha)

  6. Australian Curriculum Measurement and geometry Solve problems involving surface area and volume of right pyramids, right cones, spheres and related composite solids (ACMMG271)

  7. Statistics and probability Use scatter plots to investigate and comment on relationships between two continuous variables (ACMSP251)

  8. Number and algebra Solve problems involving direct proportion. Explore the relationship between the graphs and equations corresponding to simple rate problems (ACMNA208)

  9. Number and algebra Use the definition of a logarithm to establish and apply the laws of logarithms (ACMNA265)

  10. SKA Will generate approximately 7 000 000 000 000 000 000 bytes of data in the first week. (7 x 1018 bytes = 7 exobytes) All the words ever spoken by humanity

  11. Average number of words ever spoken by all of humanity (per day) 100 billion people (100 x 109) throughout the ages. Average number of words spoken per person in one life time = = 7 x 107 Average per day = 2600words per day

  12. Facts about Parkes, Pulsars and Pulse@Parkes

  13. Fact # 1 Since December 2007, over 1000 students from interstate schools and overseas institutions have used the Parkes Radio Telescope to collect data on pulsars for analysis. Students have controlled the telescope via the internet to observe several pulsars. Frequently Asked Questions answered at: http://outreach.atnf.csiro.au/education/pulseatparkes/teachers/teachers.html

  14. Fact # 2 A pulsar is a rapidly rotating neutron star. Jets of electromagnetic radiation stream from the pulsar and are observed as pulses of radio waves because of this rotation. The Parkes Radio telescope has been instrumental in discovering nearly two-thirds of all known pulsars.

  15. Fact # 3 • What is a Pulsar? • In 1934 Walter Baade and Fritz Zwicky proposed the existence of a new type of star -neutron star • In 1967 Jocelyn Bell discovered a pulsar(media reported the discovery as little green men)

  16. Fact # 4 • Properties • density of 1017 Kg/m-3 • thimbleful has a mass of 109tonnes • rotates once to several hundred times per second • acceleration due to gravity at surface of pulsar is ~ 1012 m.s-2 (10 m.s-2 at Earth) • escape velocity ~ 50% of the speed of light.

  17. Fact # 5 Typical pulsar diameters are approximately 20 to 25 kilometres with a mass roughly 1.4 times the mass of the Sun. The mean density is approximately 6.7 x 1014grams/cm3 which is equivalent to a single sugar cube weighing as much as all of humanity (approximately the weight of 7 billion people).

  18. Fact # 6 PSR J1023+0038, is the fastest known millisecond pulsar. It lies 4,000 light years away in the constellation Sextants and spins at a rate of 592 times a second. After discovery in 2007 , the Parkes radio telescope was used to get the first full orbit observations. Astronomers have long thought that millisecond pulsars are ordinary pulsars “spun up” with the help of an orbiting companion star. The companion dumps matter onto the pulsar, causing it to spin far faster.

  19. Fact # 6 continued Speed = = = diameter = 25 km = 46,496 km/sec (15% speed of light)

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