How many stars are in the Milky Way quizlet?
The Milky Way Galaxy is our galaxy.
It is 160,000 light years in diameter and about 2000 light years think.
It contains about 100 billion stars.
We normally consider Deneb to be a bright but distant star at 1400 ly away from the Sun..
How many stars are there in our solar system quizlet?
The solar system contains about 100 billion stars..
How much of the solar system's mass is the Sun?
Most of the nebula's material was pulled toward the center to form our Sun, which accounts for 99.8% of our solar system's mass..
Is about 30 times as far from the Sun as our own planet?
More than 30 times as far from the Sun as Earth, Neptune is the only planet in our solar system not visible to the naked eye.
In 2011 Neptune completed its first 165-year orbit since its discovery in 1846..
What are the contents of astronomy?
Astronomy is the study of everything in the universe beyond Earth's atmosphere.
That includes objects we can see with our naked eyes, like the Sun , the Moon , the planets, and the stars .
It also includes objects we can only see with telescopes or other instruments, like faraway galaxies and tiny particles..
What is the study of the planets?
Planetary science is the scientific study of planets and their planetary systems which includes moons, ring systems, gas clouds, and magnetospheres.
It involves understanding how planetary systems formed, how these systems work and how all their components interact..
Where can you observe all the stars?
You can observe all of the stars from the equator over the course of a year, although high-declination stars will be difficult to see so close to the horizon.
Only half the sky can be seen from the North Pole, and that half does not change throughout the year..
Where is our solar system located within the Milky Way galaxy astronomy quizlet?
Our solar system is located in the center of the Milky Way Galaxy.
In the grapefruit model of the solar system, it would take a few minutes to walk from the Sun to the inner edge of the Kuiper Belt (Pluto).
The observable universe is the same size today as it was a few billion years ago..
Which planet formed first?
Jupiter and Saturn are thought to have formed first and quickly within the first 10 million years of the solar system.
In the warmer parts of the disk, closer to the star, rocky planets begin to form.
After the icy giants form there's not a lot of gas left for the terrestrial planets to accrete..
Why does Venus appear so bright to the eye group of answer choices?
Venus is so bright because its thick clouds reflect most of the sunlight that reaches it (about 70%) back into space, and because it is the closest planet to Earth.
Venus can often be seen within a few hours after sunset or before sunrise as the brightest object in the sky (other than the moon)..
Why is it so difficult for astronomers to see new?
Why is it so difficult for astronomers to see new stars in the process of birth? - birth happens very quickly, so it is hard to "catch" stars in the act. - most stars are born inside dusty clouds, which block any light that may be coming from the stars..
- It is estimated to contain 100–400 billion stars and at least that number of planets.
The Solar System is located at a radius of about 27,000 light-years (8.3 kpc) from the Galactic Center, on the inner edge of the Orion Arm, one of the spiral-shaped concentrations of gas and dust. - More than 30 times as far from the Sun as Earth, Neptune is the only planet in our solar system not visible to the naked eye.
In 2011 Neptune completed its first 165-year orbit since its discovery in 1846. - There are an estimated 100 - 200 billion galaxies in the observable part of the universe, and each of those galaxies contains millions or billions of stars.
