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What type of galaxy is the Milky Way? Show Answer

Answer for 5 Points Spiral Galaxy Back to Board

Which type of galaxy includes little gas and dust and no longer producing stars? Show Answer

Answer for 5 Points Elliptical Back to Board

Define galaxy. Show Answer

Answer for 5 Points Galaxy- a collection of stars, gas, and dust bound together by gravity Back to Board

Define Universe. Show Answer

Answer for 5 Points Universe- space and all of the matter and energy in it Back to Board

Show Answer What is a light-year based on?

Answer for 5 Points A light year is the distance that light travels through space in one year. Back to Board

Show Answer What is scientific notation?

Answer for 10 Points A way of writing extremely large or extremely small numbers; uses a number between 1-10 multiplied by a power of 10. Back to Board

Name the three types of galaxies from youngest to oldest. Show Answer

Answer for 10 Points Irregular Spiral Elliptical Back to Board

List the following astronomical bodies from largest to smallest: (a). star, (b) universe, (c) galaxy Show Answer

Answer for 10 Points Universe  Galaxy  Star Back to Board

How do astronomers measure distances to the stars? Show Answer

Answer for 10 Points Light-Years, Space is too vast to use traditional units of measure, such as kilometers. Back to Board

Show Answer How is scientific notation useful to astronomers?

Answer for 10 Points Distances between objects in space are vast and large. Scientific notation make large numbers with a lot of zeros more manageable. Back to Board

Show Answer How many kilometers are equal to a light-year?

Answer for 15 Points 9.5 trillion km Back to Board

The Andromeda galaxy is located approximately 2.5 million light- years from Earth. Why is the light that reaches Earth 2.5 million years old? Show Answer

Answer for 15 Points If an object is 2.5 light years away, we know that light has been traveling at 300,000 km/s for 2.5 years. Back to Board

Show Answer How would you write a light-year in scientific notation?

Answer for 15 Points 9.5 x Back to Board

What makes up the “walls” of the Universe? Show Answer

Answer for 15 Points Clusters and Super Clusters of Galaxies Back to Board

What evidence was used to determine the universe is expanding? Show Answer

Answer for 15 Points Red-shift of the galaxies spectrum showed most galaxies are moving away from us. Back to Board

Show Answer How many light-years is the Andromeda Galaxy away from the milky way? Hint: it is 2.38 x km away

Answer for 20 Points 2.5 x 10 6 Back to Board

Show Answer Astronomers use light-years to measure distant objects in deep space. They can also use light years to determine the age of distant objects. Astronomers discovered an object that is more than 13 billion light years away. How old is this object?

Answer for 20 Points At least 13 billion years old Back to Board

Show Answer We use modern spacecraft to explore space. About how fast do these spacecraft travel? A.About 1/10,000 as fast as the speed of light B.About ½ as fast as the speed of light C.At the speed of light D.2 times faster then the speed of light

Answer for 20 Points A. About 1/10,000 as fast as the speed of light Back to Board

Show Answer What are voids in the Universe?

Answer for 20 Points Voids are huge regions in the interior of the walls. Very little matter exists in these regions. Back to Board

Show Answer How did Hubble Classify Galaxies?

Answer for 20 Points Hubble classified Galaxies using a tuning fork which separated galaxies by type then by size and shape. Back to Board

Show Answer What is the general structure of the Universe?

Answer for 25 Points The universe is made up of dense concentrations of galaxies and voids, where little matter exists Back to Board

Show Answer The planet Mars is about 228,000,000 km from the sun. How many minutes does it take for light from the Sun to reach Mars?

Answer for 25 Points Multiply 300,00 km/s (speed of Light) by 60 to find out how far light travels in 1 minute. Then divide 228,000,000 km by the result min Back to Board

Show Answer Describe the shape and composition of each type of galaxy.

Answer for 25 Points Irregular- Doesn’t have a particular shape, made of new stars and lots of gas Spiral- pinwheel shape, young stars and gas to form new stars Elliptical-Circular or egg shaped, old stars and little to no gas to form any new stars Back to Board

How fast does our current spaceships travel and what does this mean for space exploration outside our solar system? Show Answer

Answer for 25 Points Our fastest spacecraft travel at 58,000 km/hour. For perspective, Proxima Centauri, the nearest star to the Earth, is 4.3 light years away. It would take this spacecraft 75,000 years to reach Proxima Centauri. Thus, manned missions are not feasible for exploration of the universe, galaxy, and solar system Back to Board

How far away are the nearest galaxies to the Milky Way? Show Answer

Answer for 25 Points The closest galaxies are the Canis Major Dwarf galaxy 2.5 x 10 4 light-years away and the Sagittarius Dwarf Galaxy 8 x 10 4 light-years away Back to Board

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