Chapter 14 1. Radio galaxies have sources of unusually strong radio waves emitted on either side of the galaxy and active galaxies are spirals with small, highly luminous cores like Seyfert galaxies, they also have nuclei that are produced by matter plunging into super-massive black holes. 6. By observing the velocity of the stars that orbit the black hole or by the rotational speed of its accretion disk. 10.
Describe two ways in which gravity has a part in the life-cycle of a star- Gravity pulls the dust and gas in the nubula together, and compresses them so much that the inside becomes hot enough for fusion reactions to start. Gravity also pulls the remains of a red giant together after fusion reactions have stops. This forms a white dwarf. Theories about the universe- 1. What does red shift tell s about distant galaxies?
Which of the following planets is NOT a gas giant? a. Earth b. Jupiter c. Saturn d. Uranus 16. The sun gets its energy from a. burning fuel b. nuclear fusion c. shrinking due to gravity d. convection 17. The number of on any planet can be used to estimate how old the surface is.
The solar system C. Our own Milky Way galaxy D. A planetary nebula Feedback Correct Marks for this submission: 5.00/5.00. Question 4 Correct Mark 5.00 out of 5.00 Flag question Question text Astronomers can use telescopes on the ground to observe electromagnetic radiation of some wavelengths, but other wavelengths are
Science studies how everything works from the smallest (quarks) to the largest (Galactic clusters and possibly even bigger) But astronomy is just the science or study of how everything interacts in the universe. Astronomy studies how planets interact with stars and how stars interact in galaxies with their local group, then how local groups form clusters and how they interact with each other d. Who was Aristotle and what was his relationship to the science of
http://solarsystem.nasa.gov/planets/ http://solarsystem.nasa.gov/planets/profile.cfm?Object=SolarSys&Display=Moons http://solarsystem.nasa.gov/planets/profile.cfm?Display=Moons http://nasa.gov use search window to search for topics http://www.go-astronomy.com/planets/planet-moons.htm http://messenger.jhuapl.edu/ http://nineplanets.org/ |What is the hottest planet in our solar system? |Venus | |Which planet has the most
Chapter 1 • Review the components of our solar system – sun, planets, moons, asteroids, comets and their definitions o Star – a large, glowing ball of gas that generates heat and light through nuclear fusion o Planet – a moderately large object that orbits a star; it shines by reflected light. Planets may be rocky, icy, or gaseous in composition o Moon (Satellite) – an object that orbits a planet o Asteroid – a relatively small and rocky object that orbits a star o Comet – a relatively small and icy object that orbits a star o Solar System – a star and all the material that orbits it, including its planets and their moons o Nebula – an interstellar cloud of gas and/or dust o Galaxy – a great island of stars in space, all held together
Studying different stages of stars in detail can be done by using different telescopes that are used for specific purposes. This paper will touch bases on how the telescope changed our understanding of the universe and our place in it, describe the main designs of telescopes and discuss their strengths and weaknesses, define the best places to build ground-based telescopes and why astronomers choose those places, contrast the strengths and weaknesses between building telescopes on the Earth, in orbit, or even on the Moon, describe how different frequencies of light tell more about the birth, life, and death in the nature and properties of the Sun, the stars, and the universe, and describe how telescopes manage to operate in wavelengths of light that stretch from radio waves to gamma rays. Telescopes have expanded our vision to the universe. Initial telescopes showed that Earth was not the midpoint of the universe, as was formerly believed. Telescopes also indicated mountains and craters on the moon.
Have you ever looked into the night sky every day for a month to notice that Mars has moved from west to east to west again, that’s retrograde motion. Retrograde motion is a natural occurrence that appears to happen to other planets in our solar system from earth. Retrograde motion is what happens when a planet (we will use Mars as an example) looks as if it is reversing. This occurs when the Earth passes the planet. Direct motion and retrograde motion both occur with Mars, direct motion is when the planet seems to be going forward, and retrograde is when it seems to be going backwards.