Your Name:TA:Group Members:Astronomy 1101Units, Numbers, & Proportions ActivityPart 1: UnitsWe use a lot of units in Astronomy and it is good to learn prefixes that go with them. Write downusing powers of ten the number of meters in each of the following units.1.Kilometer -2.Megameter -3.Gigameter –4.Nanometer -

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Part 2: Estimation using Powers of 10 (No Calculators!)This problem should help you get some idea for distance scales ranging from interplanetary tointerstellar and beyond.Estimateyour answers using powers of 10 without using a calculator, andplease show all of your work.5.The Earth is 150 million km (1 AU) away from the Sun. The diameter of the Sun is1.4 Million km.How many Suns would have to line up side-by-side to reach from the Sunto the Earth?6.The nearest star is 250,000 AU away from our solar system. How many Suns would youhave to line up side-by-side to reach from here to the nearest star?7.Our home galaxy, The Milky Way, is about 30,000 parsecs across.The nearest big galaxy,Andromeda, is about 700,000 parsecs away.How many galaxies the size of the Milky Waywould fit in the space between our galaxy and Andromeda.1