solar system

• Kuiper Belt is a doughnut-shaped ring of icy objects around the Sun, extending just beyond the orbit of Neptune from about 30 to 55 AU.
• One astronomical unit (AU) is the distance from the sun to earth, or about 93 million miles (150 million kilometers)
• Oort Cloud is a spherical layer of icy objects surrounding our sun, a star, and likely occupies space at a distance between about 2,000 and 100,000 AU from the sun.
• Mercury is the closest planet to the Sun.
• Mercury's period of Revolution is 88 days.
• Mercury's distance from the sun is 3.6 x 10^7 miles and its diameter is 3,112 miles and it has no natural satelliites.
• Venus is the second planet from the sun.
• The average distance of Venus from the sun is 67,200,000 miles.
• Venus' period of revolution is 225 days and its diameter is 7,584 miles. It has no natural satellites.
• Earth is the third planet from the Sun with an average distance of 93,009,000 miles.
• Earth has one natural satellite named Luna.
• Mars is the fourth planet from the Sun at an average of about 141,600,000 miles or 1.52 AU
• Mars is a dusty, cold, desert world with aa very thin atmosphere.
• Mars has 2 moons, its period of revolution is 687 days and 24 and 37 minutes to rotate. Its diameter is 4,220 miles.
• Venus is also called the morning and evening star.
• Jupiter is the biggest planet in our solar system with average distance from the sun at 4.85 x 10^8 miles.
• Jupiter has a diameter of 86, 800 miles. Its period of revolution is 11 3/4 Earth years and period of rotation is 9h 50min. It has 12 natural satellites.
• Saturn is the sixth planet from the sun and the second largest planet. It has thousands of beautiful ringlets.
• Saturn's average distance from the sun is 8.9 x 10^8 miles with 75,100 miles diameter. Its period of revolution is 29 1/2 Earth years and 10h 02min period of rotation.
• Saturn has 9 moons.
• Uranus is the seventh planet from the sun with 1.78 x 10^9 miles average distance.
• Uranus is known as the "sideways planet" because it rotates on its sides.
• Uranus is also a ringed planet. It would take 84 earth days for Uranus to revolve and 10h 45min to rotate. Its diameter is 30,900 miles.
• Neptune is dark, cold, and an ice giant. It is the eighth and farthest planet in our solar system.
• Neptune takes about 15h and 48min to rotate and about 165 earth years to orbit the sun.
• The average distance of neptune from the sun is 3,67 x 10^9 miles and its diameter is 33,000 miles. It has 2 natural satellites.
• A dwarf planet is a celestial body that orbits the sun, has enough mass to assume a nearly round shape, has not cleared the neighborhood around its orbit, and is not a moon.
• Examples of dwarf planets are Pluto, Makemake, Haumea, Eris, and Ceres.
• Nebula is any large cloud of interstellar gas and dust
• Accretion is the process by which dust particles stick together to form larger particles.
• Condensation is the conversion of a vapor or a gas to a liquid or solid state, usually caused by reduction of temperature.
• Planetesimals are a minute planet; a body that could or did come together with many others under gravitation to form a planet.
• Protoplanets - a large body of matter in orbit around the sun or a star an thought to be developing into a planet.
• Meteoroid is a small rocky piece of interplanetary matter that is smaller than a kilometre.
• If any part of the meteoroid survives and enters the Earth, it is called meteorite.
• Asteroids are larger chunks of rocky celestial bodies between the orbits of mars and Jupiter called the Asteroid Belt.
• A comet is a celestial body that appears as a fuzzy head surrounding a bright nucleus, that consist of ice, methane, ammonia, and dust that often develops trails when near the sun.
• Natural Satellites - celestial body orbiting a planet or minor planet.
• Rotation is the celestial body's spinning on its axis
• Revolution is when a celestial body is going around another object in an orbit or elliptical course.