Question

The following image is a picture of the Veil Nebula made by combining several photos taken by the Hubble orbiting telescope.

The colors in the picture indicate the different elements present: blue is oxygen, green is sulfur, and red is hydrogen.

How do astronomers know which element is present where?
A. by comparing the density of the gas to the densities of various elements

B. by measuring the temperature of each part of the gas

C. by looking for specific wavelengths of light that each element produces

D. by observing chemical reactions taking place in the nebula

Answer 1

Answer: D

Explanation: I took the test

Answer 2

The astronomers tell which elements is present by looking for specific wavelengths of light that each element produce. Hence option C is correct.

What is Veil Nebula?

The veil nebula is a visible part of the supernova remnant as many parts have separate names.

Being supernova it's 20 times more massive than the sun and has components such as the western, eastern, and pickings triangle. The nebula was discovered on 5th Sept. The nebula is very bright and has an integrated magnitude of 7.

Find out more information about the imagery.

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