Which of the following statements is true about stars in the portfolio matrix?

They are fast growing market leaders. More test answers on https://studyhippo.com/marketing-3305/

What do the stars do for the speaker of “When I Heard the Learn’d Astronomer” that the lecture hall does not?

The stars offer first-hand knowledge. More test answers on https://studyhippo.com/english-11-a/

On a scale where the Sun is about the size of a grapefruit and the Earth is about 15 meters away, how far away are the nearest stars besides the Sun?

about the distance across the United States More test answers on https://studyhippo.com/mastering-astronomy-chapter-1-reading-quiz-final-exam-review-35869/

About how many stars has Hipparcos given us accurate distance data on?

A million, those with parallaxes of .005″ or large More test answers on https://studyhippo.com/honors-astronomy-final-2/

According to current understanding, how did the first generation of stars differ from stars born today?

They were much more massive than most stars born today. More test answers on https://studyhippo.com/ch-16-practice-test-questions/

How does the interstellar gas change the light of stars passing through it, even if no dust is also present?

thin atoms of gas will absorb some wavelengths of light, More test answers on https://studyhippo.com/essay-questions-for-astronomy-final/

Suppose two stars with the same luminosity are at different distances from Earth. Which has the greater apparent brightness?

the closer star The closer the object, the brighter it will appear. More test answers on https://studyhippo.com/astronomy-chapter-17/

The flat part of the Milky Way’s rotation curve tells us that stars in the outskirts of the galaxy do what?

Orbit the galactic center just as fast as stars closer to the center More test answers on https://studyhippo.com/mastering-astronomy-chapter-16-17/

We measure the speeds of stars at different radii from the galactic center and determine how much mass is interior to the orbit.

How do we determine the amount of dark matter in elliptical galaxies? More test answers on https://studyhippo.com/cosmic-perspective-chapter-23-multiple-choice-39362/

What useful purpose did RR Lyrae stars serve for Harlow Shapley in locating the galactic center?

Their brightness variations allowed accurate distances to be measured. More test answers on https://studyhippo.com/astronomy-final-chapter-13-quiz-hsu/

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Stars Flashcards, test questions and answers

Discover flashcards, test exam answers, and assignments to help you learn more about Stars and other subjects. Don’t miss the chance to use them for more effective college education. Use our database of questions and answers on Stars and get quick solutions for your test.

What is Stars?

Stars are some of the most fascinating objects in the night sky. They have captivated people for centuries and inspired many myths, legends, and stories. Stars are made up of hot gas and exist in huge numbers throughout the Milky Way galaxy. Although they appear to be small points of light from Earth, stars can range in size from several times smaller than our Sun to several times larger. These giant balls of gas burn brightly due to thermonuclear reactions taking place within them and emit radiation across the electromagnetic spectrum. The nearest star to Earth is our Sun, which is located about 93 million miles away from us. The second closest star is Proxima Centauri, located 4.2 light-years away from Earth (which means it takes light 4.2 years to travel from Proxima Centauri to our planet). Despite its proximity, Proxima Centauri cannot be seen with the naked eye because it is a faint red dwarf star that is about 1/7th as bright as our Sun. Stars come in many different colors depending on their temperatures and masses; blue stars tend to be hotter than yellow stars while red stars tend to be cooler than yellow ones (our sun falls into this category). Stars also vary greatly in terms of their lifespans; some may live for only a few hundred thousand years while others may last for billions of years or more. Apart from being beautiful objects that sparkle in the night sky, stars also serve an important purpose: they provide us with energy. Our sun has been continuously producing energy since its formation 4.5 billion years ago and will continue doing so until it runs out of fuel (estimated at around 5 billion years). This energy powers photosynthesis a process that allows plants to create food while also providing us with heat and light on Earth. In conclusion, stars are amazing objects that have captivated people throughout history with their beauty and power alike.