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prather-chap1

# prather-chap1 - Solutions to all Prather et al workbook...

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Solutions to all Prather et al. workbook pages relevant to what we covered in Chapter 1. For section 1 of Chapter 1: "Looking at Distant Objects" - pp 131-132 For section 2 of Chapter 1: "Sun Size" - pp 105-108 "Milky Way Scales" - pp 123-126 ----------------------------------------------------------- Looking at Distant Objects: #1: Light-year is a unit of distance, the distance light travels in one year. #2: Sydney lives 4.3 ly from the Sun. #3: 11.4 years -- Crystal's picture takes that long. #5: Yes, the farther away the child lives, the older he/she is when you actually receive his/her message. #6: Crystal sent her picture first and Sydney sent her picture last. #7: As it wasy 2.5 million years in the past. Light takes that long to travel the distance between Andromeda Galaxy and here. #8: 10 million years, 40 million years, 60 million years ago. #9: a and e ----------------------------------------------------------- Sun Size: 1. baseball 2. you should draw something that has the Moon 30-earth diameters away from Earth. 3. d. 4. five things that might work: basketball and grain of sand basketball and pea soccerball and grain of sand soccerball and pea baseball and grain of sand 5. two Moon orbits would fit across the Sun.

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6. d.
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prather-chap1 - Solutions to all Prather et al workbook...

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