ELS L4

• Mercury

  Small planet
• Planetary Orbit

  The path around the sun
• Neptune

  Fourth-largest planet
• Planetary Orbit

  The material of the solar system, including the planets, orbits the sun because of the sun’s huge gravitational pull
• Mars

  Very cold place
• Venus

  Second planet
• Jupiter

  Biggest planet
• Star

  • Huge glowing ball of hot gas in space
  • It shines because of the nuclear fusion reaction (fusion of hydrogen atoms forming helium atoms)
• Uranus

  Seventh planet in distance from the Sun
• DIWATA 1

  • Philippines’s first microsatellite and the first satellite built and designed by Filipinos
  • Also known as PHL-Microsat-1
  • Launched at the International Space Station (ISS) in March 23, 2016
• Asteroids

  Rocks that are orbiting the sun; most orbit between Mars and Jupiter
• Meteorites

  Meteors that actually hit the earth’s surface
• Nebula

  • A vast cloud of dust and gas in space; birthplace of stars
  • The word "nebula" comes from the Greek word for "cloud"
• Moon

  Natural satellite of a planet
• Hubble Space Telescope

  • Takes extremely high-resolution images
  • Launched on April 24, 1990, aboard the Space Shuttle Discovery, Hubble is currently located about 332 miles (535 km) above Earth's surface, where it completes 15 orbits per day — approximately one every 95 minutes
• Meteors

  Meteoroids that enter the earth’s atmosphere (falling star)
• Saturn

  Ringed planet
• Meteoroids

  Pieces of asteroids that break off and continue a path through space
• Planets in the Solar System

  • Sun
  • Mercury
  • Venus
  • Earth
  • Mars
  • Jupiter
  • Saturn
  • Neptune
  • Uranus
• Hubble Space Telescope is named after Edwin Hubble
• Characteristic Properties of the Solar System

  • Disk shape of the solar system
  • Two planetary types: Terrestrial-inner planets; high density; rocky worlds (Mercury, Venus, Earth, Mars)
  • Jovian- outer planets; low density with thick atmospheres and liquid or ice interiors (Jupiter, Saturn, Uranus, Neptune)
  • Jovian planets have planetary rings and large satellite systems
  • Space debris: asteroids, comets, and meteoroids
  • Asteroids in inner solar system, composition like Terrestrial
• Our solar system is made up of a star, eight planets and countless smaller bodies such as dwarf planets, asteroids and comets
• Planetary Orbit

  • The planets’ orbits are not quite perfect circles, but ellipses
  • All except Pluto orbit the sun in the same plane and the same direction
• Earth

  Third planet
• Sirius is the brightest star
• Sidereal Day
• Space debris

  • Asteroids
  • Comets
  • Meteoroids
• The Earth rotates in a west-east direction or in a counterclockwise direction
• Earth's axis of rotation

  Inclined (tilted) 23.5° relative to its plane of revolution around the sun
• Phases of the Moon

  • New Moon is completely dark
  • Full Moon is fully lighted
  • Waxing Moon grows from new to full moon over two weeks
  • Waning Moon shrinks back to new moon over the next two weeks
  • Gibbous moon seems to bulge on the side nearest to the sun
  • Crescent moon seems to shrink on the side further from the sun
• One revolution around the sun = 365.2422 solar days or 365 days 5 hr 48 min 46 sec
• Sun

  • A vast fiery ball of gas and dust that provides the earth with energy
  • Composition: Hydrogen and Helium
  • A star is called a "sun" if it is the center of a planetary system
  • The sun's average temperature = 5,600° Celsius
• Total Solar Eclipse
• Characteristics of the Solar System

  • Asteroids in inner solar system, composition like Terrestrial planets
  • Comets in outer Solar System, composition like Jovian Planets
• Inclination of the Earth's axis

  Creates the seasons and causes the sun's height in the sky at noon to increase and decrease as the season changes
• Lunar Month
• Sun rises every day in the east and sets in the west
• Daylight Hours
• Earth's Major Subsystems

  • Moon
• Lunar Eclipse