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@ A galaxy is a vast, gravitationally bound collection of billions of stars
Their "friends" include nebulae, stellar remnants, planets and other smaller particles including the basic elements hydrogen and helium. Galaxies also consist of an important but poorly understood substance called dark matter. It is believed to surround every galaxy and accounts for much of its mass.
STELLAR REMNANTS - Stellar Remnant is a collective term used to describe the stars that are left .
DARK MATTER - dark matter is a type of matter hypothesized to account for a large part of the total mass in theuniverse. Dark matter cannot be seen directly with telescopes.
Galaxies vary in size and shape. Galaxies are categorized based on their apparent shapes
@ It is estimated that there are between 100-300 billion galaxies. A galaxy is a large group of stars that are held together by gravitation or gravity. The universe is expanding every possible day. So know one knows how many galaxies there are.
@ Shortly after the big bang about 14 billion years ago, collapsing gas and dust clouds have lead to the formation of galaxies.Most theories assumptions: filled with hydrogen and helium,,Some areas were slightly denser than others.
@ Our solar system is located at one of its spiral arms at the edge. Everything we see in the sky belongs to the Milky way. Milky way is of SBc type. It has roughly 200billion stars. Sun is 26000 light years far from the center of the galaxy.
@ELLIPTICAL: Contains very little gas and dust, and the gas that is present is very hot and diffuse. No current star formation in elliptical galaxies.( little interstellar matter) The stars in elliptical galaxies are old Population II stars.( They tend to be older, less luminous and cooler. metal poor"-They
Their "friends" include nebulae, stellar remnants, planets and other smaller particles including the basic elements hydrogen and helium. Galaxies also consist of an important but poorly understood substance called dark matter. It is believed to surround every galaxy and accounts for much of its mass.
STELLAR REMNANTS - Stellar Remnant is a collective term used to describe the stars that are left .
DARK MATTER - dark matter is a type of matter hypothesized to account for a large part of the total mass in theuniverse. Dark matter cannot be seen directly with telescopes.
Galaxies vary in size and shape. Galaxies are categorized based on their apparent shapes
@ It is estimated that there are between 100-300 billion galaxies. A galaxy is a large group of stars that are held together by gravitation or gravity. The universe is expanding every possible day. So know one knows how many galaxies there are.
@ Shortly after the big bang about 14 billion years ago, collapsing gas and dust clouds have lead to the formation of galaxies.Most theories assumptions: filled with hydrogen and helium,,Some areas were slightly denser than others.
@ Our solar system is located at one of its spiral arms at the edge. Everything we see in the sky belongs to the Milky way. Milky way is of SBc type. It has roughly 200billion stars. Sun is 26000 light years far from the center of the galaxy.
@ELLIPTICAL: Contains very little gas and dust, and the gas that is present is very hot and diffuse. No current star formation in elliptical galaxies.( little interstellar matter) The stars in elliptical galaxies are old Population II stars.( They tend to be older, less luminous and cooler. metal poor"-They