How can astronomers see stars right next to the sun quizlet?
If you go into space, you can see stars right next to the sun (as long as you block sunlight), because there is no atmosphere.
What is the relationship between latitude and the angular height of the sun?.
How do astronomers learn what elements are present in a given star quizlet?
Astronomers are able to tell which elements are present in distant stars by analyzing the line spectra of the light emitted.
This spectra is then compared to the known spectra of the elements to determine the identity of these elements..
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..
What is the sun made of quizlet astronomy?
The sun is made of 71% hydrogen, 27% helium, and 2% heavier elements (carbon and oxygen)..
What is the unusual motion of a planet called?
This apparent erratic movement is called "retrograde motion." The illusion also happens with Jupiter and the other planets that orbit farther from the sun..
When a periodic comet leaves its dusty debris?
When a periodic comet leaves its dusty debris behind in its orbit, the Earth can intercept this debris and lose ozone from its atmosphere..
Where are the two identical telescopes Keck I and Keck II located?
The W.
M.
Keck Observatory , located on the summit of Mauna Kea on the Big Island of Hawaii, consists of twin 10-meter telescopes intended for astronomical observations at optical and infrared wavelengths..
Which of the following is the largest distance diameter of a typical galaxy?
Most galaxies are 1,000 to 100,000 parsecs in diameter (approximately 3,000 to 300,000 light years) and are separated by distances on the order of millions of parsecs (or megaparsecs)..
- Galileo was the first astronomer to point a telescope at the sky.
Galileo was the first person to record the motion of the moon's around Jupiter. - Spectroscopy of a star can reveal its temperature, composition, and line-of-sight motion.
The broader the spectral line, the higher the pressure of the gas that is creating it.
In our Sun, the spectral lines of hydrogen are weak, compared to their appearance in hotter stars. - The Sun is 109 times wider than the Earth and 330,000 times as massive.
- Unfortunately, the Sun is the only star whose angular diameter is easily measured.
All the other stars are so far away that they look like pinpoints of light through even the largest ground-based telescopes. (They often seem to be bigger, but that is merely distortion introduced by turbulence in Earth's atmosphere.)
