Time and Distance lab
Sarah: 4.3 sec 0.01/4.3=0.002km/sec 63,072km/year
Manaas: 2 sec 0.01/2=0.005km/sec 157,680km/year
10m=0.01km
S=d/t
km/sec (60sec/1-min) (60min/1-hr) (24hr/1-day) (365days/1year)=___km/year
Manaas: 2 sec 0.01/2=0.005km/sec 157,680km/year
10m=0.01km
S=d/t
km/sec (60sec/1-min) (60min/1-hr) (24hr/1-day) (365days/1year)=___km/year
Light Year
- Light's Speed: 300,000 kilometers/ second
- Light Year:
Distance light travels in one year
1 light year= 9.5 trillion kilometers or 5.9 trillion miles
Galaxies
Galaxy:
- groups of stars, gases and dust held together by gravity
- Clusters: Galaxies that travel together
- 3 main types:
Spiral
- Characterized by a bulge at the center and spiral arms
- Spiral shape is caused by the rotation of the galaxy
- Galaxies that do not fit into any other class
- As their name indicates they have irregular shapes
- Characterized by very bright centers and very little dust and gas
- Appear elongated or spherical and are basically massive blobs of stars
- Composed of mostly old stars