How many light years old are you?

Slides:

Advertisements

Similar presentations

S1 Science Planet Earth topic

Advertisements

of Earth (in the center)

How many light years old are you?

Light Years Grade 8 Unit 10.

The Metric System - BIG Okay, so you have gotten a look at the metric world of the small and very small, but now it is time to look at the metric world.

Distances in Space.

OUR COSMIC ADDRESS Each of us has an address. Ours is: The Denver Museum of Nature and Science 2001 Colorado Blvd. Denver, Colorado But what.

Customary Proportions I Customary Proportions II.

Mph Knots Mach Light Year Warp What do theses terms measure? Turn to your should partner and discuss for 1 minute. BE PEPARED TO SHARE.

Our Place in the Universe (Chapter 1) The Structure and Size of the Universe.

GALAXIES Types Of Galaxies. How Far are Galaxies? Just as stars, galaxies are measured in light years. So what is a light year? Light travels at 186,000.

U2: Astronomy - Measuring Space Distances FLIP LESSON.

Distances in Astronomy. Which unit would you use to measure your height? – Millimeters – Centimeters – Meters – Kilometers Talk with a partner about why.

Distances in our Universe The universe is so large that we must use special units of measurement. Kilometers and miles just won’t cut it.

Distances in Space. How Far Away are Stars & Other Celestial Bodies? Use Stellarium to observe the sky and discuss what observations you might be able.

The Sun and other stars The Sun is a Star and a source of light for everyone on Earth The light from the Sun takes 8.3 minutes to reach us Like all stars,

NEXT Player 1 Player 2 Player 3 Player

Distances in Space Science 9. Using scientific notation Distances in space are very large We use scientific notation to represent very large and very.

Astronomy Astronomy = study of celestial objects and phenomena outside Earth’s atmosphere Includes galaxies, stars, planets, moons, cosmic radiation, etc.

Light Years Away.. Questions 1-10 (1 point each) Question 11 (2 points) Total Points (12 Points)

Describing the Stars Genesis 1:16 – On the fourth day of creation “God made two great lights; the greater light to rule the day, and the lesser light to.

Topic: Light Years Essential Question: How do scientists use light years to measure distances in our universe?

Objectives: Learn what units scientists measure distances in space. Define and use an astronomical unit to measure distances in space. Define and use a.

Distances in Space This Mini Lesson Will Cover: What units do astronomers use to measure vast distances in space?

Here and Now Chapter 1. Where are You? To find our place among the stars, we will zoom out from a familiar scene, to the largest scales in the universe.

Size and Scale Sizes and distances in astronomy are extremely large… in fact beyond comprehension Scientists (and the world) use the metric system Units.

 Solar System: 4.6 billion years old  Earth: 4.5 billion years old  Universe: 13.8 billion years.

Our Place in Space Where we are 1. We live on Earth 2 Welcome to Earf!

Measuring the Very Large.  For distance that is.  The Kilometer  What exactly *is* a kilometer?  1000 meters  We walk at about 5 km/hr, or

Space Space is HUGE! Distances in Space Astronomical Units Light Years

Measuring the Very Large.  For distance that is.  The Kilometer  What exactly *is* a kilometer?  1000 meters  We walk at about 5 km/hr, or

The EARTH is 93 Million Miles from the SUN.

Part 1: Distances in Space

Numero 1 The sun is about 150 million kilometers from earth. How long does it take light from the sun to reach earth? (The speed of light is 3x10 8 m/s.)

Measuring the Distance to the Stars

Horizons PowerPoint Presentations by Markus Böttcher Michael A. Seeds Brooks/Cole – Thomson Learning 9 th Edition.

Astronomic Distances. Solar system- planets and other objects like comets and asteroids that travel around the sun Background.

Making Sense of the Universe

Light Years and Our Universe STAAR th Grade.

Space is really big! How do scientists measure distances in space?

The Universe & Galaxies Key Point (Std 8-4.9): Recall the Sun’s position in the universe, the shapes and composition of galaxies, and the distance measurement.

Distances in Space. Interplanetary Distances Compared to how far away the stars are, separation of the planets is a relatively small distance. Examples:

Goal to understand the scale of the universe

EARTH’S PLACE IN THE UNIVERSE

The Big Bang Theory.

Order the cards to show the cosmic terms in increasing size

The wider universe.

Observing and exploring space

Distance in Space Light years.

One light year is equal to the distance traveled by light in one year (through empty space). One light year = 1 ly = 6 trillion miles = 9.5 trillion.

The Sun and Light Years.

The Metric System - BIG Okay, so you have gotten a look at the metric world of the small and very small, but now it is time to look at the metric world.

Distances in Space.

What is a Light Year?

Bell Ringer 1 – Take out your notebook

Topic: Light Years Essential Question: How do scientists use light years to measure distances in our universe?

Minds On Read Mysteries Beyond the Planets (Pg. 353) and summarize the article in one paragraph.

Smallest to Largest ? Universe Solar System Galaxy.

Distances in Space.

What type of measuring unit would we need for distances across space?

Middle School Physical Science Space Introduction – Grade 6-7

Distances in Space.

MEASURING ASTRONOMICAL DISTANCES

Measuring Distances in Space

What is a Light Year?

myastrologybook

Presentation transcript:

How many light years old are you?

So If light years aren’t a measurement of time, then what do they measure?

What is a Light Year? What does a light year measure? A light year is the distance light travels through space in one year! Light travels at a speed of 186,000 miles per second or 300,000 kilometers per second, which means it can travel around the Earth 7 times in a second! Figure out how many miles light can travel in a light minute, light hour, light day, light week, light month and light year.

What is a Light Year? One Light year = 5,879,000,000,000 miles or 10,000,000,000,000 km. So light travels 5,879,000,000,000, miles or almost 10,000,000,000,000 km in one year. The approximate conversion from light years to km is light years x 10,000,000,000,000 km

Why measure distances in light years? Astronomers use light years instead of kilometers to measure interstellar distances because the amount of kilometers would be such a ridiculous number that it would be hard to understand. What unit of measurement would you use to measure the distance around the world? Kilometers or millimeters? Explain! For the same reason light years are used to measure the distances between stars instead of miles/kilometers because interstellar distances are so vast.

Putting light years into perspective At 55 miles-per-hour, it would take over 50 million years to get to Proxima Centauri! You can never see Proxima Centauri as it is now, only as it was 4 years ago. Proxima Centauri is approximately 40 trillion km away or approximately 4 light years.

Putting light years into perspective The Andromeda Galaxy is the most distant object you can readily see with the naked eye. The light your eye is receiving left the galaxy about 2 million years ago. If the galaxy disappeared by some mysterious means, the people on Earth wouldn’t know for another 2 million years

Putting light years into perspective When you look out into space, you are looking back in time. There is absolutely no way to know exactly what an object out in space looks like right now!

Putting light years into perspective It is impossible to know exactly what an object looks like in the present because it takes TIME for the light to reach our eyes. It is not instantaneous When astronomers spot an explosion on the sun, they’re not seeing it in real time; the light from the explosion takes 8 minutes to get to Earth. Your picture should reflect this point

Why is it currently impossible to travel outside of our Milky Way Galaxy?