the gravitationally bound system of the sun and the objects that orbit the sun, either directly or indirectly

an open cluster located about 440 light years from Earth

idea that the universe began as just a single point, then expanded to how large it is now, and is still expanding

rocky planet with no atmosphere, has a huge metallic core and its surface is covered with impact craters, 1st planet from the sun

gas giant with 27 moons, its rotational axis is almost horizontal to its orbit, has a thin ring system, 7th planet from the sun

rocky planet with a thin atmosphere; surface features include craters, valleys, deserts, and ice caps; 4th planet from the sun

gas giant with 63 moons that gives off more energy than it receives from the sun, largest planet from the solar system, 5th planet from the sun

the imaginary line that passes through the geographic North Pole and the geographic South Pole

a system of millions or billions of stars, together with gas and dust, held together by gravitational attraction

a small planetary-mass object that is in direct orbit of the sun

occurs when the moon passes through the shadow produced by earth

the day when day and night are equal length: 12 hours

gas giant with 14 moons, most distant planet from the sun, has the strongest winds of any planet