astronomy video 1

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Across
  1. 4. distance light can travel in one year (about 300,000 km/s speed of light)
  2. 5. a volume in which matter and energy can exist in. It can be stretched, compressed, and curved by forces such as gravity.
  3. 6. the history of the universe into a single year, Similar to voyage model; keeps events in perspective
  4. 11. A massive black hole and the many star systems that orbit it, Sagittarius A* is the massive black hole at the center of the Milky Way. 4 million times more massive than the sun, rIt would take over 100,000 years to traverse across the Milky Way
  5. 12. scale to represent the solar system, 1:10 billion scale, everything is 10 billion times smaller and distance is divided by 10 billion, 6.3 million meters? 0.63 millimeters, 696 million meters? 7 cm, Works well for planet-sized or larger objects in the solar system
  6. 15. Stars Planets Moons Asteroids Comets Nebulas and Black holes
  7. 16. A star and all of the objects that orbit it, including planets, moons, asteroids, etc., Our _ is called the solar system, There is only one solar system in the universe, but many star systems
  8. 17. Everything beyond earth’s atmosphere.
  9. 18. Large ball of gas and plasma that generates light and heat through nuclear fusion, Typically orbits a black hole, Exists for millions or billions of years depending on size, Formed in a nebula, Observed by emitting light
  10. 19. Earth, Solar system, Milky Way Galaxy, Local Galactic group, Local superclusters, Observable universe
Down
  1. 1. a meteoroid or asteroid that survives its trip to earth’s surface
  2. 2. earth moves quite fast, movement around the axis, around the sun, sun orbits Sagittarius A*, Motion on Earth, Axis rotation speed depends on latitude, max at equator, min at poles about 730 mph, Around the sun, 67,000 mph or mach 87, We feel acceleration, not speed
  3. 3. All matter, energy, space, and time were compressed into a singularity. The singularity expanded with intense heat, distributing stuff that becomes matter and energy. The early universe lacked the basic laws of physics. As the universe expanded and cooled, stuff condensed into energy and matter. Early matter was very simple: subatomic particles. As the universe continued to cool, complex matter like atoms and molecules formed. There are different theories for how the universe will change. It may expand more quickly, expand at the same rate, or even contract. Depends on properties of dark matter and energy which are still under investigation
  4. 7. A large region in outer space containing gas and dust, Provides raw materials for stars to form. Called “star nurseries”, Excitation of gas particles causes vibrant colors
  5. 8. Natural objects that orbit a planet. Rocky or icy, A planet may have zero or many (90+), can form from ejected planet matter or a captured asteroid
  6. 9. tails are created by ice breaking off and scattering light
  7. 10. a streak of light in the sky, produced by a meteoroid entering the atmosphere
  8. 13. are rock, comets are a mixture of ice and rock
  9. 14. Large object that orbits a star, May be rocky, icy, or gaseous, Formed from the remnants of star’s accretion disk, Observed by reflecting light