what does brightness of a star have to do with anything?

Question

studying for my astronomy final, and i need a definition of this word for my cheat sheet....HELP?

Answer 1

1) The distance between the observer & the star - the closer, the brighter, the farther , the dimmer. [***most important***]

2) The size of the star - some are alot bigger than others.

3) The color of the star; the blue white stars are easier to see than the duller redder stars.

4) Double stars or clusters often are seen with the unaided eye as a single bright star & discerned with a telescope to be more than just one star but in alignment with one another or very close on our line of sight.

5) The brightest stars tend to be the critical stars that comprise the constellations, the ones used primarily for navigation in olden times, and the only ones visible at all in our urban light-polluted skies.

Astronomy provides us a window on one of our universes; it amazes & awes me. Good luck on your test!

;-)

Answer 2

i assume if with the better gravity of a crimson great that if products have been to be caught interior of its gravity nicely then specific, products ought to orbit a RG. yet for the way long? who's acquainted with. i think of a RG. here i got here upon something; (one million) branch of Astronomy, college of Pennsylvania, Philadelphia, PA, united statesA. gained: sixteen April 1985 precis The survival of the Jovian planets and their satellites because of the fact the sunlight will become a crimson great is seen. that's got here upon that the Jovian planets would not lose any be counted - now not even hydrogen. The satellites would lose their gaseous or volatile envelopes. Their rocky cores would stand up to melting and stay to inform the tale. the two the planets and the satellites would be unsuited to help human existence. reliable success