``. How big is a galaxy ? It’s so big, we measure in ridiculous units called light years. That’s the distance light travels in a year.

Slides:

Advertisements

Similar presentations

S1 Science Planet Earth topic

Advertisements

Drake and ExoPlanets – Green Bank, WV The Drake equation states that: where: –N is the number of civilizations in our galaxy with which communication.

How many centimeters are there in one kilometer?

All of the planets in our solar system revolve around our sun. Today you will investigate the speeds at which they move around. Orbiting Our Sun.

Cosmic History Big Bang Cosmology is a well accepted theory (12-16 billion years ago) Gravity drives the formation of our Milky Way galaxy (11-14 billion.

NSCI 314 LIFE IN THE COSMOS 14 -THE DRAKE EQUATION Dr. Karen Kolehmainen Department of Physics, CSUSB

Extra-Terrestrial Life and the Drake Equation Astronomy 311 Professor Lee Carkner Lecture 25.

Extra-terrestrial Civilizations. Are we alone? Contact … Direct contact through traveling to the stars and their planets Will be a challenge because of.

THE MYSTERY OF THE SOLAR SYSTEM KINDERGARTEN. WHEN YOU LOOK UP AT THE SKY, DO YOU EVER WONDER WHAT IS OUT THERE?

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.

The Origin and possible existence of Life in the Universe.

Tonight’s Agenda. Questions ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?

Mrs. Breeding 6 th Grade. The fastest thing that we know of is light which travels at a speed of 186,000 miles per second in empty space. To get an idea.

Ch. 31 – Galaxies & the Universe   Have you seen the Milky Way at night? The Sun is one of over 100 billion stars that make up the Milky Way. The Sun.

NSCI 314 LIFE IN THE COSMOS 15 - THE DRAKE EQUATION: HOW COMMON ARE EXTRATERRESTRIAL CIVILIZATIONS THAT ARE SUFFICIENTLY TECHNOLOGICALLY ADVANCED THAT.

Waves in the Universe Size, distance, & light C = 186,000 miles per sec.

© 2005 Pearson Education Inc., publishing as Addison-Wesley 1.2 The Scale of the Universe How big is Earth compared to our solar system? How far away are.

Chapter 18 The Search for Extra- terrestrial Life.

LGM Background One of the first things astronomers get asked is “Are UFO’s Real” The simple truth is we don’t know if any other life forms exist but.

Final Exam Comprehensive –Most questions from Ch , some from Ch. 4-14, few from Ch. E-3 Multiple choice plus few short answer questions Please study:

The Size of the by The Dark Side Universe It takes 16 hours to fly from Alaska to Chile in a 747 going 900 km/h. It would take two years to walk it.

Understanding What Mr. K. NASA/GRC/LTP Edited: Ruth Petersen Numbers Tell Us.

Light-year and AU A light-year is the distance light can travel in 1 year. It is not a measure of time. It is used to measure the distance to stars and.

Life in the Universe What We Want to Know There is intelligent life on Earth Could it have happened elsewhere? Alien Spacecraft/UFO’s? Evidence is unconvincing.

Are “they” out there?. Fermi’s Paradox  Back in the 1940’s, a group of scientists were discussing extraterrestrial life.  Fermi asked “So? Where is.

THE LIGHTS IN THE SKY ARE STARS. SPECULATION: IS THERE LIFE ON OTHER WORLDS - PLANETS AROUND OTHER STARS OR PLANETS AND MOONS WITHIN OUR OWN SOLAR SYSTEM?

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

The TWO-INCH Universe A powerful set of analogies to examine size and distance in astronomy Source: smithsonianeducation.org.

The Basic Structure of the Universe. What is the Universe? All matter and energy, including the earth, all the galaxies, and the contents of intergalactic.

Searching for Extraterrestrial Civilizations. The Drake Equation N civil = N *  f p  n p  f l  f i  f c  f L where N * =the number of stars in the.

The EARTH is 93 Million Miles from the SUN.

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.)

The solar system What is the solar system? The Sun, its planets and other objects in orbit are all together known as the solar system.

Planet Earth Earth’s Cycles

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

Search for Intelligent Life 1.Possibility of intelligent life outside of earth- Drake Equation- An early Approach to solving the statistical problem.

Exploring our Solar System part 2. Who wants to go into space? What do you think?

The Chances for Intelligent Lift? The Chances for (Intelligent) Life?  Is there intelligent life elsewhere?  How could we contact them?  How will humanity.

SETI. Extra Terrestrial Intelligence Is there intelligent life on other planets? If so, –Can we find them? –Can we try to communicate? SETI is the Search.

The hierarchy of the Universe, Step 1 Earth Moon Size: 3476 km Distance: 384,400 km Step 1: orbiting bodies The hierarchy of the Universe Size : 12,756.

Is There Life Out There?. Miller-Urey Experiment This chemical apparatus is designed to synthesize complex biochemical molecules by energizing a mixture.

Conner Smith October 24, 2012 FYOS  Estimates the number of technological civilizations that might exist  Detectable extraterrestrial civilizations.

Is There Intelligent Life Elsewhere in the Universe? Is there any evidence intelligent life exists other than on Earth? How would you go about looking.

The Galaxy Song By Monty Python. Just remember that you're standing on a planet that's evolving and revolving at 900 miles an hour.

SETI The search for extraterrestrial Intelligence.

Planet Earth S1 Science Topic 4.

Orders of Magnitude PTYS January 2008.

Using the GAVRT Radio Telescope: The SETI Project

of Earth (in the center)

Goal: To understand life in our universe.

Life in the Universe How much life is there?

1. If you travel at 10mph for 1 hour, how far do you travel?

High School Teachers 2006.

The wider universe.

STRUCTURE OF THE UNIVERSE PRACTICE QUIZ

LIFE Out There?.

The Immensity of the Universe

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.

Milkyway Galaxy:.

Distances in Space.

SETI: 50 Years and Counting

The Quest for Extraterrestrial Intelligence

What is a Light Year?

S1 Science Planet Earth topic

Middle School Physical Science Space Introduction – Grade 6-7

S1 Science Planet Earth topic

Stars, Planets, and Moons

What is a Light Year?

myastrologybook

Presentation transcript:

``

How big is a galaxy ? It’s so big, we measure in ridiculous units called light years. That’s the distance light travels in a year.

A light year is a unit of distance 186,000 (300,000 km) miles in a second X 60 sec in a minute X 60 min in an hour X 24 hours in a day X 365 days in a year That’s 5.86 e12 miles, or 9.5 e 12 km. Hella Far.

This galaxy is about 50,000 light years across. The fastest astronauts ever traveled was about 11 km/s At that speed, it would take about years to cross this galaxy.

At rocket speed, a trip to the nearest star, 4 light years away, would take years. One Way. And we’re pretty certain it doesn’t have planets. Anyone want a ticket ?

The Drake Equation N = N* fp ne fl fi fc fL

N* represents the number of stars in the Milky Way Galaxy Question: How many stars are in the Milky Way Galaxy? Answer: Current estimates are 100 billion.

fp is the fraction of stars that have planets around them Question: What percentage of stars have planetary systems? Answer: Current estimates range from 20% to 50%.

ne is the number of planets per star that are capable of sustaining life Question: For each star that does have a planetary system, how many planets are capable of sustaining life? Answer: Current estimates range from 1 to 5. Or about 10% to 50%

fl is the fraction of planets in ne where life evolves Question: On what percentage of the planets that are capable of sustaining life does life actually evolve? Answer: Current estimates range from 100% (where life can evolve it will) down to close to 0%.

fi is the fraction of fl where intelligent life evolves Question: On the planets where life does evolve, what percentage evolves intelligent life? Answer: Estimates range from 100% (intelligence is such a survival advantage that it will certainly evolve) down to near 0%.

fc is the fraction of fi that communicate Question: What percentage of intelligent races have the means and the desire to communicate? Answer: 10% to 20%

fL is fraction of the planet's life during which the communicating civilizations live Question: For each civilization that does communicate, for what fraction of the planet's life does the civilization survive? Answer: This is the toughest of the questions. If we take Earth as an example, the expected lifetime of our Sun and the Earth is roughly 10 billion years. So far we've been communicating with radio waves for less than 100 years. How long will our civilization survive? Will we destroy ourselves in a few years like some predict or will we overcome our problems and survive for millennia? If we were destroyed tomorrow the answer to this question would be 1/100,000,000th. If we survive for 10,000 years the answer will be 1/1,000,000th.