What Does Dark Matter Mean In Science

Matter definition the substance or substances of which any physical object consists or is composed.

What does dark matter mean in science.

Roughly 80 of the mass of the universe is made up of material that scientists cannot directly observe. Unlike for dark matter scientists have no plausible explanation for dark energy. More is unknown than is known we know how much there is and we know some of its properties. Roughly 70 of the universe is made of dark energy.

What is dark energy. Dark matter is a form of matter thought to account for approximately 85 of the matter in the universe and about a quarter of its total mass energy density or about 2 241 10 27 kg m 3 its presence is implied in a variety of astrophysical observations including gravitational effects that cannot be explained by accepted theories of gravity unless more matter is present than can be seen. Dark matter definition a hypothetical form of matter invisible to electromagnetic radiation postulated to account for gravitational forces observed in the universe. Together dark matter and dark energy make up 95 of the universe.

Dark matter is stuff in space that has gravity but it is unlike anything scientists have ever seen before. Matter should not be confused with mass as the two are not the same in modern physics. Known as dark matter this bizarre ingredient does not emit light or energy. Most of this baryonic dark matter is expected to exist in the form of gas in.

The rest everything on earth everything ever observed with all of our instruments all normal matter adds up to less than 5. According to one idea dark energy is a fifth and previously unknown type of fundamental force called quintessence. Two varieties of dark matter have been found to exist. The matter of which the earth is made.

Various types of mass are defined within physics including but not limited to rest mass inertial mass. The rest is dark matter. Matter is a general term describing any physical substance by contrast mass is not a substance but rather a quantitative property of matter and other substances or systems. Other than that dark energy is a mystery but an important one.

That only leaves a small 5 for all the matter and energy we know and understand.