Life Cycle of Star
BY: John Pfeifer
Nebula
A nebula is a cloud of dust and gas space that you see at night. A nebula is the first stage of a star.
Main Sequence Star
Stage 3
a main sequence star is about 90% of the stars in the universe. They are stars that are in a line based on there luminosity and temperature.Red Giant Star
A big star of high brightness and low surface temperature. Red giants are thought to be in a late stage of a star’s evolution when there is no hydrogen remaining in the core to fuel nuclear fusion.
White Dwarf
A star about the size of the earth. A white dwarf is formed when a low-mass star has drained all its central nuclear fuel and lost its outer layers as a planetary nebula.
Black Dwarf
It is a white dwarf that has cooled down to the temperature of the cosmic microwave background. Unlike red dwarfs and white dwarfs, black dwarfs are entirely hypothetical.
Vega
Current mass- 2.135
Temperature- (8,152-10,060)Kelvin
Brightness- 40.12
Color- bluish whitish
Vega Extra Information
Lightyears-25.3
Age- around 455,000,000 years
-"arguably the next most important star in the sky after the Sun."
-July 17, 1850 the first picture of Vega was taken it was the first star other than the sun to be photographed.
-William Bond and John Adams Whipple took the first picture of vega.
- Vega was the first star to get its spectrum recorded.
-Vega was one of the to be used to estimate the distance through the parallax measurement.
- photometric brightness scale used vega as the baseline.
- Henry Draper was the first person to show absorption lines in the spectrum of a star in August 1872 after taking a picture of vega.