Question: Which of the following statements is probably true about the very first stars in the universe?
A They were made only from hydrogen and helium
B H
2
C More massive than a hundred times the Sun
D None of these
Answer: They were made only from hydrogen and helium
| Aspect |
Description |
| Composition |
Primarily composed of hydrogen and helium with trace amounts of lithium and beryllium. |
| Formation |
Believed to have formed around 100-200 million years after the Big Bang |
| Mass |
Estimated to be very massive, possibly tens to hundreds of times the mass of the Sun. |
| Metallicity |
Virtually zero metallicity |
| Energy Generation |
Powered by nuclear fusion of hydrogen into helium in their cores, like modern stars. |
| Lifespan |
Short-lived, with lifetimes on the order of a few million years due to their high mass and energy output. |
| Impact on the Universe |
The first stars played a crucial role in reionizing the universe and are thought to be responsible for the initial ionization of intergalactic hydrogen. |
