It is a massive, hot ball of plasma, inflated and heated by energy produced by nuclear fusion reactions at its core. the star at the center of the Solar System.planets Known as 'Terrestrial Planets', these planets orbit closest to the sun and feature hard rocky surface.and ClarkĞxplorers who set out in 1804 to find a water route to the Pacific ocean.free roaming animal on the plains, important to the survival of Native Americans, threatened by western settlers.Expansion migration and settlement from the East to the West.small natural objects that revolve around other objects.A small planet closest to the sun with a dense rocky surface and no atmosphere.system a star and all the planets and other bodies that revolve around it.a large, round body that revolves around a star.Colonel George Armstrong Custer Led the battle of Washita River, in which Chief Black Kettle was killed.SoldiersĚfrican American soldiers who fought during the Civil War and after, keeping peace between American Indians and settlers, led by Benjamin Grierson.Remembered for his efforts to make peace with settlers Black Kettle Southern Cheyenne Chief who moved his tribe twice in 1861 and in 1867 in accordance with treaties.

planets Known as the 'Gas Giants', these planets orbit the sun further away and include primarily planets with no rocky surface.The second planet from the sun and the hottest planet in the solar system, which has gasses that cause a 'greenhouse like effect'.Removal Act Law passed in 1830 to tive Andrew Jackson the power to move American Indians west of the Mississippi River.Two companies began building a transcontinental (across the continent) railroad, linking East with the West. railroad act In 1862 President Abraham Lincoln signed the Pacific Railway Act.Act of 1862 Gave any head of a household, widowed women, or any man over 21 the right to claim one 160-acre portion of land.Grierson leader of the Buffalo soldiers.Fourth planet from the sun, known as the 'Red Planet', has many volcanoes.Express mail service that ran from April 1860 to October 1861.the path of one object in space around another object.Abbreviation Theory that something hit the Earth to get the moon.This super event caused the formation of our solar system.Symbols for the 3 elements that primarily make up the 98% of the mass that formed the sun.Volatiles like water ammonia and methane.Covection _ produce magnetic field on Earth.Grand Canyon got nothing on this Valles.Damage shows up everywhere Moon Venus Mercury.Type of planets that form in the middle of the solar system.Objects not affected by planet's gravity.Process that signals the birth of a star.Dark feautre on Mars, thought to be a sea.'There's a little black _ on the Sun today' Feature on the sun.Magnetic _ protect earth from solar winds.3 letter abbreviation for theory of how the solar system was created.The line after which volatile chemicals can be found, in a picture.Boundary between us and interstellar space.Type of collapse that started the formation of the solar system.The type of cloud where are solar system is from.Venus Photobombs the Sun by crossing in front of it.Compound found in molecular clouds (Symbol + number).the complete cycle of a planet on its orbit.number of Americans that have walked on the moon.planet with no atmosphere most cratered.shape of the moon right before and after new moon.planet with the largest mountain in the solar system.the longest & shortest days of the year.outer band of icy rocks that orbit the sun.shape of moon right before and after full moon.rocks that are too small to be considered a planet.phases of the moon with decreasing light.the highest winds in the solar system are here.planet that is tilted on its side also coldest planet.phases of the moon with increasing light.the lighter shadow cast during an eclipse allows some light through.

Solar orbiter crossword clue