Review question from chapter 1

Review question from chapter 1 - and they give off tons of...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
Review question from chapter 1 : 3, What is the difference between our solar system, our galaxy and the universe? Our solar system is made up of the Sun (the nearest star), and bodies (like the planets) which are gravitationally bound to it. It is much smaller than the distance to the nearest star. Our galaxy is filled with many stars (~100 billion) and their planets, as well as gas and dust. The universe is the cosmos, which is everything there is. It includes billions of galaxies. 4, Why are light-years more convenient than miles, kilometers or astronomical units for measuring certain distances? Because the distances are so vast. The numbers in kilometers or miles would be too huge. In light years they already are. 5,Why it is difficult to detect planets orbiting others stars? The simple answer is the size of the planets and the distance involved. Stars are easy to see because they are very large, compared to planets,
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Background image of page 2
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: and they give off tons of radiation in the form of light and various other kinds. Planets on the other hand are relatively small, on a cosmic scale, and do not produce any noticeable emissions. Since the closest stars to the Earth are light years away, that large distance combined with the small size of planets makes detecting them very difficult. Also, the emissions of the stars that planets would be orbiting could easily obscure the view of the planets The simple answer is the size of the planets and the distance involved. Stars are easy to see (Because they are simply so small and so insignificant in comparison to their parent star, that they are out shined and out weighed.) 6, What does the size of the star image in a photograph tell you? The size of a star image in a photograph tells you only how bright it looks ....
View Full Document

This note was uploaded on 11/02/2009 for the course ARTS arts 101 taught by Professor Tims during the Fall '09 term at DeAnza College.

Page1 / 2

Review question from chapter 1 - and they give off tons of...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online