Hydrogen and Helium
The names of two nebulae are the Orion Nebula and the Crab Nebula.
Andromeda, Milky Way These are galaxies ^ Orion Nebula Eagle Nebula
The Sun is primarily composed of hydrogen (74% by mass) and helium (24%). These two elements make up more than 98% of the Sun's total mass. Other elements like oxygen, carbon, neon, and iron make up the remaining portion in smaller quantities.
Two well-known nebulae are the Orion Nebula (Messier 42) and the Crab Nebula (Messier 1). The Orion Nebula is a diffuse cloud in the constellation Orion, visible to the naked eye, while the Crab Nebula is a remnant of a supernova explosion observed in the year 1054.
The sun is primarily composed of hydrogen (about 74%) and helium (about 24%). These two elements make up the vast majority of its mass, with traces of other elements present.
The names of two nebulae are the Orion Nebula and the Crab Nebula.
Andromeda, Milky Way These are galaxies ^ Orion Nebula Eagle Nebula
There is no such thing as a nebula star.
Lagoon Nebula; Trifid Nebula
The Sun is primarily composed of hydrogen (74% by mass) and helium (24%). These two elements make up more than 98% of the Sun's total mass. Other elements like oxygen, carbon, neon, and iron make up the remaining portion in smaller quantities.
Roughly 98% of the solar nebula's mass consisted of hydrogen and helium gases. These two elements are the most abundant in the universe and are the primary components of stars like our sun.
Two well-known nebulae are the Orion Nebula (Messier 42) and the Crab Nebula (Messier 1). The Orion Nebula is a diffuse cloud in the constellation Orion, visible to the naked eye, while the Crab Nebula is a remnant of a supernova explosion observed in the year 1054.
No elements make time.
The two most abundant elements in Earth's mantle are oxygen and silicon. They primarily exist in the form of minerals such as silicates, which make up the majority of the mantle's composition.
After a chemical reaction two elements form a chemical compound.
Carbon and hydrogen are the two main elements that make up crude oil.
The planet Uranus' atmosphere contains primarily two gaseous elements. These two elements are Hydrogen (H) and Helium (He). It also contains methane (a combination of two elements - Hydrogen and Carbon - CH4). This gives Uranus it's aquamarine colour.