Celestial Bodies

1
Celestial Bodies

• By Adrian G, Erin N, and Kelsey M

2
Introduction

• Do scientists know all about our galaxy, the
  Milky Way? No. There is much that waits to be
  discovered. This PowerPoint show focuses on
  celestial bodies. Celestial bodies are
  constellations, comets, meteors, asteroids,
  galaxies, and basically everything in space.

3
Comets
Comets are made of dust, stones, ice, and frozen
gases. Their tail is made of gas and dust and
faces away from the solar wind coming from the
Sun. They are only a few miles across, but when
the sun heats them, they turn to gas and expand
to thousands of miles across. Their ellipse
(orbit) is shaped like a flat beach ball.
One famous comet is Halleys
Comet. It is seen every 76 years. Its
discoverer was Edmund Halley, who discovered it
in 1682.
4
Asteroids
An asteroid is a huge chunk of stone and metal
left over from the creation of the Solar System.

• Famous Asteroids

• The Asteroid Belt
• Between Mars and Jupiter (or the divider between
  the near and far planets)
• Maybe over one million asteroids over 0.5 miles
  across
• A planet may have once existed there, the
  asteroids may be leftover debris of the planet

• Name
• Ceres
• Vesta
• Pallas
• Hygeia
• Interamnia
• Davida

• Diameter
• 584 mi
• 335 mi
• 326 mi
• 267 mi
• 202 mi
• 202 mi

5
Meteors

• Meteors are made up of rock and dust. Meteors
  are smaller than asteroids. They are called
  meteorites when they hit planets. The biggest
  meteor ever found was Hoba West and weighed 66
  Tons. There are small meteors called
  micrometeoroids. Meteor showers are seen as
  streaks of light. Some people call them shooting
  stars. A lot of times, these shooting stars come
  in showers over several nights.

6
Galaxies

• Our galaxy is called the Milky Way, a spiral
  galaxy. There are four main types of galaxies,
  Spiral, Elliptical, Irregular, and Barred-Spiral.
  Our Solar System is found in the outer reaches of
  the Milky Way, and is a tiny speck compared to
  the vast Milky Way. Millions of Solar Systems, or
  groups of stars and planets are in the Milky Way.
  Galaxies are so big that even the small ones take
  billions of light years to cross. Galaxies are
  formed by clouds of spinning gasses, and some of
  those clouds still spin.
• Local Galaxies
• Andromeda
• M33
• Large Magellanic Cloud
• Small Magellanic Cloud
• NGC8822
• NGC205

7
Stars and Constellations
Stars are a gaseous mass within space that give
off light. They live more or less than 10 billion
years. One of the mysteries about stars is why do
the stars twinkle? We have the answer. As the
light travels through earths atmosphere,
turbulence in the atmosphere messes with some and
make them look like they are twinkling.
Constellations are a group of stars that form a
path, creating a picture. Long ago, people named
stars and constellations after animals, gods, and
heroes. The next couple slides will go in depth
with some.
8
The Life of a Star
1.) Nebulae (cloud of gases) 2.) Dwarf Star 3.)
Expanding Star 4.) Red Giant Star 5.)Shrinking
Star 6.)White Dwarf Star
9
Fall and Winter Constellations in the Northern
Hemisphere

• Winter
• Auriga
• Caelum
• Canis Major
• Canis Minor
• Carina
• Columba
• Eridanus
• Fornax
• Gemini
• Horologium
• Lepus
• Monoceros
• Orion
• Pictor
• Puppis
• Reticulum
• Taurus Vela

• Fall
• Androneda
• Aquarius
• Aries
• Cetus
• Grus
• Lacerta
• Pegasus
• Perseus
• Phoenix
• Piscis Austrinus
• Pisces
• Sculpton
• Triangulum
• Has details on Details page

10
Spring and Summer Constellations in the Northern
Hemisphere

• Spring
• Antlia
• Bootes
• Cancer
• Canes Venatici
• Centaurus
• Coma Berenices
• Corvus
• Crater
• Hydra
• Leo
• Leo Minor
• Lupus
• Lynx
• Pyxis
• Sextans
• Virgo

• Summer
• Aquila
• Ara
• Capricornus
• Corona Australis
• Corona Borealis
• Cygnus
• Hercules
• Delphinus
• Equuleus
• Indus
• Libra
• Lyra
• Microscopium
• Ophiuchus
• Scorpius
• Scutum
• Sagittarius
• Telescopium

11
Constellation Details

• Fall/Winter
• Eridanus
• Mid-November to late December
• Long line of stars named after mythological Greek
  river
• One star, Epsilon Eridai, 10.8 light years away
• Another star, Achernar, 85 light years away
• Perseus
• Mid-September to mid-November
• Resembles Perseus, ancient Greek hero
• Many open star clusters
• One star, Algol, has an eclipse for almost 3
  days, one star passes in front of it and Algol
  fades to nearly ½ of its brightness
• A meteor shower occurs between July 25 and August
  20 in Perseus

• Spring/Summer
• Bootes
• Found in Spring
• Looks like a herdsmen
• Ophinchus
• Found in Summer
• Greeks thought it looked like it held a snake

12
Wow Fun Facts

• Stars change by moving, because the Big Dipper
  wasnt the shape of a dipper at first, but many
  years later it changed and looked like a big
  dipper.
• The universe is still expanding by the Big Bang.
  The big bang was the asteroid that might have
  killed the dinosaurs.
• There are many galaxies like M33, M32, Wolf-
  Lundmark, and Etc.
• Stars move approximately ten miles each second.
  Our galaxy is a spiral galaxy.
• An asteroid called Ida has a moon.
• Comets, meteors and asteroids are different
  because we often see meteors, but not comets or
  asteroids.
• Some comets are so far away that you cant see
  them move.
• In olden times, comets were called a bad omen.