1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
yan [13]
4 years ago
10

What makes a star's spectrum appear to be different from another star's?​

History
1 answer:
allochka39001 [22]4 years ago
3 0

Explanation:

If a star is moving toward Earth, its light waves seem to be squeezed together. The decreasing distance between Earth and the star shortens the wavelength of the starlight received by Earth. This shifts the star's spectral lines toward the blue end of the spectrum. If the star is moving away from us, its waves are effectively stretched out when they reach Earth, increasing their wavelength. This shifts the star's spectral lines toward the red end of spectrum.  Dark lines in stellar spectra are being caused by absorption of wavelengths of energy by the elements in the star's outer levels. patterns of absorption lines that appear at shorter or longer wavelengths than normal indicate that the star is moving. The greater the shift from the normal position of the lines, the faster the star is moving.

You might be interested in
In which group would most Americans be found
abruzzese [7]
Brittish group because it is were we came from
3 0
3 years ago
How did merchants help trade to grow on the Arabian Peninsula?
diamong [38]

Explanation:

The regions conquered in the Muslim conquest included rich farming regions in the Maghreb, the Nile Valley and the Fertile Crescent. As is true of the world as a whole, agriculture dominated the economy until the modern period, with livestock grazing playing a particularly large role in the Arab world. Significant trade routes included the Silk Road, the spice trade, and the trade in gold, salt, slaves and luxury goods including ivory and feathers out of sub-Saharan Africa.

8 0
3 years ago
Read 2 more answers
Which practice produces farmland with poor soil ?
gtnhenbr [62]

Answer:

A. Slash and burn

Explanation:

The slash and burn method is a very harmful method for the soil, as well as for the whole environment. This method is consisted in total removal and burning of the vegetation in certain area in order to free up space for farmlands. The slash and burn method is mostly used in forested areas, the majority of which are tropical rainforests. The soil in this areas is relatively good, but its top part is very loose, so once the natural protection of the vegetation is removed, it is heavily affected by erosion. This leads to a situation where the soil can only be used fro few years before it becomes almost unusable, so the people continue to slash and burn other areas, living behind barren land with very poor soil.

8 0
3 years ago
Who is considered the true founder of San Antonio
Klio2033 [76]

Answer:

On May 1, 1718, Franciscan Antonio de San Buenaventura y Olivares established San Antonio de Valero, one of five Spanish missions to be located along the San Antonio River. On May 5, 1718, Martín de Alarcón, governor of the province of Texas, founded San Antonio de Béxar Presidio

Explanation:

6 0
3 years ago
Read 2 more answers
In 1741 explorers discovered large populations of sea otters and fur seals in the waters around the aleutian islands. the explor
Ann [662]
The correct answer is Russia

Russian explorers discovered the area and decided to take it for themselves in order to hunt there and get fur. Through this place they went even westwards into Alaska. This is how Russia got Alaska in its possession before it eventually decided to sell the territory to the United States government. It has belonged to the US ever since.
6 0
3 years ago
Other questions:
  • As a response to the Panic of 1907, Congress created the Federal Reserve System, consisting of twelve regional banks.A. TrueB. F
    8·1 answer
  • The date of Christmas was chosen by early Christians because it __________.
    14·2 answers
  • Which of the following is an example of forced migration?
    8·1 answer
  • “Our national policy is this:First, by an impressive expression of the public will and without regard to partisanship, we are co
    8·2 answers
  • PLZ HELP !!! I WILL MARK YOU BRAINLIEST !!!
    14·1 answer
  • What are the various climates which exist in the us
    10·1 answer
  • Which best explains why Britain divided Florida into two colonies following the French and Indian War?
    12·2 answers
  • What is reductionism​
    13·2 answers
  • Pls pls help will give brainliest!!
    6·1 answer
  • PLEADE HELP WILL Give brainliest Write three body paragraphs for an essay arguing that either the UNIA or the
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!