N 1868, helium was discovered by looking at the sun almost thirty years before it was discovered on earth. How was that possible? Group of answer choices

a, The size of the sun flares suggested that the matter was twice the mass of hydrogen

b, They captured cosmic rays from the sun that had helium in it

c, They found a meteorite that contained helium

d, By looking at the light from the sun they found a spectrun of light that was not from any known element

Nebulae are enormous clouds in outer space. they are made mostly of hydrogen gas, helium gas, and dust. some nebulae glow brightly, while others do not. the stars that people see are huge, bright balls of glowing gas. they are made mostly of hydrogen and helium. which statement correctly describes other ways in which nebulae and stars are different? a. stars can form inside a nebula but a nebula can never be produced by any star. b. a star always has a higher density than a nebula. c. stars can never form inside a nebula but a nebula can be produced by any star. d. a nebula always has a higher density than a star.