Main Sequence Star Red Giant Planetary Nebula White Dwarf

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Presentation transcript:

Main Sequence Star Red Giant Planetary Nebula White Dwarf Star Formation Nebula Protostar Neutron Star Massive Star Red Super Giant Black Hole SuperNova

STARS ARE CLASSIFIED ACCORDING TO THEIR: Size Temperature Color Brightness

GALAXY- a group of stars, dust, gas, and other objects held together by gravitational forces.

Our fastest spacecraft travels 30 km/s; it can travel from Los Angeles to San Francisco in 25 seconds. At this speed, it would take 40,000 years to travel to the nearest star (Alpha Centauri- 4.3 light years), and it would take 10 billion years to travel across our galaxy.

LIGHT YEAR- The distance light travels in one year LIGHT YEAR- The distance light travels in one year. This is equivalent to light traveling at 300,000 km/s, or 186,000 miles/s. ASTRONOMICAL UNIT (AU)- The distance between the Earth and the Sun (150 million km).

SPIRAL GALAXY Consist of a dense area in center surrounded by spiraling arms.

BARRED SPIRAL GALAXY Have a bar-shaped structure in center.

ELLIPTICAL GALAXY Looks like the central portion of a spiral galaxy without the arms.

LENTICULAR GALAXY Lens-shaped with a smooth, even distribution of stars and no central, denser area.

IRREGULAR GALAXY Peculiar shapes and do not appear to rotate like those galaxies of other shapes.

NEBULA A huge cloud of dust & gas from which stars form.

ORION NEBULA

SUPERNOVA The explosion of a very large star.

CYGNUS LOOP- SUPERNOVA

CONSTELLATION- a pattern of stars in the sky.