Bell Quiz 1. What does NASA stand for? 2. How long does it take for light from the sun to get to the Earth? 3. What does this symbol mean? ∞ 4. Who was the president who inspired the space program? 5. Where is the Asteroid belt located.
APOD
Powers of ten Describe the movie php?mod=watch_powersof10
Who wants to be a millionaire? If you received $1000 per day, how many days would it take until you had $1,000,000? Funding support for outreach programs provided by the Utah State Legislature and the Utah State Board of Education
Who wants to be a billionaire? If you received $1000 per day, how many days would it take until you had $1,000,000,000? Funding support for outreach programs provided by the Utah State Legislature and the Utah State Board of Education
So, if you began in 700 BC and received $1000 a day from then until now, you would barely have a billion dollars. Funding support for outreach programs provided by the Utah State Legislature and the Utah State Board of Education
Astronomers estimate that our galaxy, the Milky Way, has over one hundred billion stars. If you could catalog 1000 stars a day for 2700 years, you would only have cataloged 1% of the stars in our galaxy. Funding support for outreach programs provided by the Utah State Legislature and the Utah State Board of Education
Technology Inventions – list threeInventions Water Filtration System Light-emitting diode
Airplane Parachute Gas Sensor
Scaling Device Remote Control command system
Telescopes over time link
Geocentric Universe Earth is the center of the universe Plato, Ptolemy
Heliocentric Universe Sun is the center of the universe Copernicus, Galileo
The Mechanical Universe Laws of the universe Kepler, Newton
Island Universes Millions of Galaxies Messier, Shapley and Hubble
The expanding universe The Big Bang Theory Einstein, Lemaitre
Cosmology The study of the current state, origin and evolution of the universe
BIG BANG THEORY The universe was created billion years ago from a cosmic explosion that hurled matter in all directions. Very difficult to prove.
Lemaitre In 1927 came up with the theory of the Big Bang
Edwin Hubble Found evidence to support the Big Bang theory. Noticed galaxies moving away from each other by observing their light waves.
Light Light behaves two ways: –Particle - Photon –Wave
Electromagnetic Spectrum All wavelengths and frequencies of light
Long wavelength Interacts with charged particles
Cook food by heating up water molecules Communication with satellites
Can’t reach earth’s surface Skin can emit light that can be picked up with infrared night vision
Only radiation humans can see ROYGBIV
UV – harmful to skin, destroys DNA Most is blocked by the atmosphere Ozone hole is where more comes through
Images used for medical uses Carcinogenic
Photons Radiation – Bad Most is man made from nuclear plants
Red Shift A shift in the spectra of very distant objects towards longer wavelengths (RED)
Blue Shift A shift in the spectra of very distant objects towards shorter wavelengths. (BLUE)
SPECTRA ntumzone/index.htmlhttp:// ntumzone/index.html
Doppler Effect Frequency of a wave increases in intensity as the object moves toward the observer and decreases as the object moves away from the observer.
Gravity Relationship (attraction) between two masses (objects) G= 6.6 x Example: –5 meters apart –Mass of 20 kg and 325 kg
More practice 1. Figure the gravitational force between a 70 kg man and the earth (5.9 x10 ^ 24 kg) if the distance is 6.37 x 10^6. 2. The earth and the sun? Sun( 1.00 x10^30) if the distances is 1.5 x 10^8 km
The Fate of the universe
The Big Rip – Acceleration increases shredding atoms to pieces
The Big Crunch – Acceleration decrease causing matter to shrink and collapse into a black hole