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Page 1: Galaxies are collections of stars (between 200 billion and 400 billion) that all rotate (orbit) around a massive central point

Galaxies

Page 2: Galaxies are collections of stars (between 200 billion and 400 billion) that all rotate (orbit) around a massive central point

Galaxies are collections of stars

(between 200 billionand 400 billion)

that all rotate (orbit) around

a massive central point.

Page 3: Galaxies are collections of stars (between 200 billion and 400 billion) that all rotate (orbit) around a massive central point

There are 3 types of galaxies…•Spiral•Elliptical•Irregular

Page 4: Galaxies are collections of stars (between 200 billion and 400 billion) that all rotate (orbit) around a massive central point

Our home galaxy is the Milky Way. Our galaxy as seenfrom Earth’s surface.

Page 5: Galaxies are collections of stars (between 200 billion and 400 billion) that all rotate (orbit) around a massive central point

Our Galaxy

We are locatedabout 2/3 of the way out fromthe galactic core.

Page 6: Galaxies are collections of stars (between 200 billion and 400 billion) that all rotate (orbit) around a massive central point
Page 7: Galaxies are collections of stars (between 200 billion and 400 billion) that all rotate (orbit) around a massive central point

3 Types of Galaxies

Spiralhave arms of stars, gas , and dust that curve away

from the center of the galaxy in a spiral pattern

Ex. – Milky Way

Ellipticalshaped like spheres or eggs; have

almost no dust or gas between stars; contain

old stars

Irregularfaint galaxies

without a definite shape; smaller than the other types of galaxies; contain

fewer stars

The process of galaxies colliding to create a larger galaxy is knownas “galactic cannibalism.”

Images taken from: http://school.discoveryeducation.com/schooladventures/universe/galaxytour/toknow.html

http://school.discoveryeducation.com/schooladventures/universe/galaxytour/toknow.html
Page 8: Galaxies are collections of stars (between 200 billion and 400 billion) that all rotate (orbit) around a massive central point
Page 9: Galaxies are collections of stars (between 200 billion and 400 billion) that all rotate (orbit) around a massive central point

1. Spiral Arms

The armscontaingas, dustand stars.

The arms rotatearound the galactic core.

Page 10: Galaxies are collections of stars (between 200 billion and 400 billion) that all rotate (orbit) around a massive central point

2. The Galactic Plane

Spiral galaxiesform a flatrotating diskof material.

Page 11: Galaxies are collections of stars (between 200 billion and 400 billion) that all rotate (orbit) around a massive central point

Side View

Galactic Plane

Page 12: Galaxies are collections of stars (between 200 billion and 400 billion) that all rotate (orbit) around a massive central point
Page 13: Galaxies are collections of stars (between 200 billion and 400 billion) that all rotate (orbit) around a massive central point
Page 14: Galaxies are collections of stars (between 200 billion and 400 billion) that all rotate (orbit) around a massive central point

3. The Galactic CoreThe core of the galaxy is wheremost of the starsare found. It isvery bright and is an intense sourceof x-rays and radio waves.

Page 15: Galaxies are collections of stars (between 200 billion and 400 billion) that all rotate (orbit) around a massive central point

3. The Galactic Core

Page 16: Galaxies are collections of stars (between 200 billion and 400 billion) that all rotate (orbit) around a massive central point

3. The Galactic Core

Page 17: Galaxies are collections of stars (between 200 billion and 400 billion) that all rotate (orbit) around a massive central point

Our solar system orbitsaround the galactic core.It takes 250 million yearsfor us to make one complete orbit.

Page 18: Galaxies are collections of stars (between 200 billion and 400 billion) that all rotate (orbit) around a massive central point
Page 19: Galaxies are collections of stars (between 200 billion and 400 billion) that all rotate (orbit) around a massive central point
Page 20: Galaxies are collections of stars (between 200 billion and 400 billion) that all rotate (orbit) around a massive central point
Page 21: Galaxies are collections of stars (between 200 billion and 400 billion) that all rotate (orbit) around a massive central point
Page 22: Galaxies are collections of stars (between 200 billion and 400 billion) that all rotate (orbit) around a massive central point

Why can’t we see the galactic core verywell ???

Page 23: Galaxies are collections of stars (between 200 billion and 400 billion) that all rotate (orbit) around a massive central point

Because of all the gas and dust in the way.It blocks our view just as fog or smokewould block your view on Earth.

Dark gasand dust.

Page 24: Galaxies are collections of stars (between 200 billion and 400 billion) that all rotate (orbit) around a massive central point
Page 25: Galaxies are collections of stars (between 200 billion and 400 billion) that all rotate (orbit) around a massive central point
Page 26: Galaxies are collections of stars (between 200 billion and 400 billion) that all rotate (orbit) around a massive central point
Page 27: Galaxies are collections of stars (between 200 billion and 400 billion) that all rotate (orbit) around a massive central point
Page 28: Galaxies are collections of stars (between 200 billion and 400 billion) that all rotate (orbit) around a massive central point
Page 29: Galaxies are collections of stars (between 200 billion and 400 billion) that all rotate (orbit) around a massive central point
Page 30: Galaxies are collections of stars (between 200 billion and 400 billion) that all rotate (orbit) around a massive central point
Page 31: Galaxies are collections of stars (between 200 billion and 400 billion) that all rotate (orbit) around a massive central point
Page 32: Galaxies are collections of stars (between 200 billion and 400 billion) that all rotate (orbit) around a massive central point

Barred Spiral Galaxies - They’re a type of spiral galaxy in which there are only two spiral arms. Can you see why how it got its name?

Page 33: Galaxies are collections of stars (between 200 billion and 400 billion) that all rotate (orbit) around a massive central point
Page 34: Galaxies are collections of stars (between 200 billion and 400 billion) that all rotate (orbit) around a massive central point

Elliptical Galaxies are . . .

. . . you guessed it, they’re oval shaped.

Page 35: Galaxies are collections of stars (between 200 billion and 400 billion) that all rotate (orbit) around a massive central point

Ellipticalgalaxiescontainalmost NO gas or dust.They onlyhave stars inthem.

Page 36: Galaxies are collections of stars (between 200 billion and 400 billion) that all rotate (orbit) around a massive central point

Elliptical galaxies are also smaller than spiral galaxies and have no spiral arms.

Page 37: Galaxies are collections of stars (between 200 billion and 400 billion) that all rotate (orbit) around a massive central point

But they do have a bright core with densely packed stars just like spirals.

And they also have a core that emits x-rays.

Page 38: Galaxies are collections of stars (between 200 billion and 400 billion) that all rotate (orbit) around a massive central point
Page 39: Galaxies are collections of stars (between 200 billion and 400 billion) that all rotate (orbit) around a massive central point

The name pretty much says it all..

Page 40: Galaxies are collections of stars (between 200 billion and 400 billion) that all rotate (orbit) around a massive central point

Irregular galaxies have an irregularshape. No two are exactly alike.

Page 41: Galaxies are collections of stars (between 200 billion and 400 billion) that all rotate (orbit) around a massive central point

Irregular galaxies containalmost NO stars. They’re virtually all gas and dust.

Page 42: Galaxies are collections of stars (between 200 billion and 400 billion) that all rotate (orbit) around a massive central point
Page 43: Galaxies are collections of stars (between 200 billion and 400 billion) that all rotate (orbit) around a massive central point
Page 44: Galaxies are collections of stars (between 200 billion and 400 billion) that all rotate (orbit) around a massive central point
Page 45: Galaxies are collections of stars (between 200 billion and 400 billion) that all rotate (orbit) around a massive central point
Page 46: Galaxies are collections of stars (between 200 billion and 400 billion) that all rotate (orbit) around a massive central point

Spiral Galaxies. Elliptical Galaxies Irregular Galaxies

Galaxies OPEN ACCESS galaxies

The Goals of Particle Physicsolness/quarknet/stroynowski.pdf · 2002-01-16 · • Astronomical observation: spiral and disk-like galaxies (like ours) rotate and the velocity of stars

STAR FORMATION IN GALAXIES: 1. INTRODUCTION TO GALAXIES · STAR FORMATION IN GALAXIES: 1. INTRODUCTION TO GALAXIES ... Low mass galaxies starforming, blue disk galaxies ... sensitivity

Galaxies The Family of Galaxies

¥Elliptical Galaxies & Bulges ¥Dwarf Elliptical Galaxies ...richard/ASTRO620/ellipticals-pp.pdf · Nearly Normal Galaxies 1: Elliptical Galaxies & Bulges ¥Elliptical Galaxies have

1 Enter rotation angle Click Rotate for rotate and flip options

Shift rotate

Physics of galaxies | Physics of galaxies

The First Billion Years of History - seeing Galaxies Close to the Dawn of Time

GALAXIES Pages 639-642. Galaxies Def: large scale groups of stars (approx. 100 billion) bound by gravitational attraction- rotates around a center Def:

rotATE SCREEN.docx

SOAR Fall 2004 Earth’s place in the cosmos. Population of the Cosmos ~100 Billion Galaxies = 10 11 Galaxies ~ 100 Billion Stars in each galaxy = (10 11

The UNIVERSE has BILLIONS of Galaxies We are in the Milky ......Expanding dust and gases condensed to form galaxies filled with stars. 5 Billion years ago, dense area became our

Galaxies and More Galaxies!

Durham Research Online · 2020. 11. 16. · Key words: methods: numerical–galaxies: evolution–galaxies: formation–galaxies: kine-matics and dynamics–galaxies: spiral–galaxies:

Starsgasdust Galaxies are collections of stars, gas, and dust held together by gravity. 125 billion Scientists believe there are about 125 billion

10.2 Galaxies Our star, the sun, is one of 100 - 400 billion stars in the Milky Way galaxy, and there are 125 billion galaxies in the universe! See pages

Two ten-billion-solar-mass black holes at the centres of ... · Two ten-billion-solar-mass black holes at the centres of giant elliptical galaxies ... locity dispersion or bulge luminosity

Stars and Galaxies - WordPress.com · Stars and Galaxies 1. Characteristics of ... •Over 3 billion stars can be seen through ... to form more massive nuclei

Galaxies. Galactic Morphology Interacting Galaxies "Active" Galaxies

THE MILKY WAY Intro Info. The Universe has about 100 billion to 1 trillion galaxies, and each galaxy has on the average 100 billion and 1 trillion numbers

Life in the Universe. 100 billion+ star systems in the Milky Way ◦ New exoplanets being discovered every day 100 billion+ galaxies in observable universe

Systems containing millions, or even billions, of stars Observable universe contains as many as 50 billion to 100 billion galaxies; millions of light years

Origin of Life 004b. Universe formed 15 billion years ago (Big Bang) Galaxies formed from stars, dust and gas Earth formed 4.6 billion years ago

Cosmology and the Evolution of the Universe...1 – 2 billion years Formation of Galaxies: Young galaxies seen as quasars 9 – 10 billion years Formation of Solar System: Sun and

scan154 rotate

Mr. Mac’s Earth Science Classroom Galaxies - Group of stars, gas, and dust. - There are over 40 billion galaxies in the universe! - 1000 to 1,000,000 light

conclusion).docx  · Web view2020. 5. 4. · UFO (concclusion) There are 100 billion stars in this galaxy, and there are 100 billion such galaxies, so there are 1022 stars in the

Universe formed 15 billion years ago (Big Bang) Galaxies formed from stars, dust and gas Earth formed 4.6 billion years ago

The evolution of the dust and gas content in galaxies · Key words. galaxies: evolution, galaxies: fundamental parameters, galaxies: high-redshift, galaxies: ISM, infrared: galaxies

Galaxy Review. Astronomers estimate that the universe contains 100 galaxies 100 million galaxies 100 billion galaxies 100 trillion galaxies

Galaxies and More Galaxies! It is now believed that there are over 100 billion galaxies, each with an average of 100 billion stars… 10 20 stars altogether!

Galaxies GALAXIES Stars are not randomly sprinkled throughout the universe. Most astronomers agree that there are about 100 billion galaxies in the universe,

Origin of Life. Universe formed 15 billion years ago (Big Bang) Galaxies formed from stars, dust and gas Earth formed 4.6 billion years ago