First dead star in universe not concealed by helium and hydrogen discovered
Q. Scientists have discovered the first dead star in the universe lacking _____gas.- Published on 04 Apr 16a. Hydrogen
b. Helium
c. Carbon
d. Both a and b
e. All the above
ANSWER: Both a and b
Astronomers will gain major insights into the evolution of stars after the discovery of the first dead star in the universe not concealed by hydrogen and helium. This will enable the scientists to study the exposed core of the star and provide knowledge about the evolution of stars and what happens when these stellar objects die.
- When stars run out of fuel and die, they collapse inwards and boil away leaving huge quantities of gases and a hot dense core of the star called the white dwarf.
- Generally, the atmosphere is dominated by helium and hydrogen; these are lighter than heavier elements such as oxygen and carbon
- They therefore flow to the top of the atmosphere of the star and block it from the view of astronomers
- This has been averted by the discovery of this special dead star which will provide rare observational test of the evolutionary path towards white drawrfs
- The star is called Dox
- It is 1200 light years away in constellation Draco
- It has an atmosphere that is 99.9% oxygen
