Characteristics used to classify stars include color, temperature, size, composition, and brightness . Stars vary in their chemical composition. Astronomers use spectrographs to determine the elements found in stars.
What are the 4 characteristics of stars on the HR diagram?
A star can be defined by five basic characteristics: brightness, color, surface temperature, size and mass .
What star properties are shown on the HR diagram?
The main-sequence in the H-R Diagram is a mass sequence . Temp, Luminosity and Mass all increase and decrease together. The vast majority of stars in the Galaxy are low-mass objects.
What are the 5 properties of stars?
Characteristics used to classify stars include color, temperature, size, composition, and brightness . Stars vary in their chemical composition. Astronomers use spectrographs to determine the elements found in stars.
What are the two main types of star clusters?
Star cluster, either of two general types of stellar assemblages held together by the mutual gravitational attraction of its members, which are physically related through common origin. The two types are open (formerly called galactic) clusters and globular clusters .
What does an H-R diagram describe?
Hertzsprung-Russell diagram, also called H-R diagram, in astronomy, graph in which the absolute magnitudes (intrinsic brightness) of stars are plotted against their spectral types (temperatures) . ... The most massive stars explode in supernovas.
How do you plot a star on an H-R diagram?
Plot the luminosity on the y-axis with brighter stars going toward the top. Since brighter stars have lower magnitudes, if you choose to plot magnitude on the y-axis, the values will decrease as you go up! That’s OK – just remember that the luminosity of the star is increasing. Plot temperature on the x-axis.
What is the star life cycle?
A star’s life cycle is determined by its mass . The larger its mass, the shorter its life cycle. A star’s mass is determined by the amount of matter that is available in its nebula, the giant cloud of gas and dust from which it was born.
What is the classification of our star?
Our sun is a dwarf star . Yellow dwarfs are small, main sequence stars. The Sun is a yellow dwarf. A red dwarf is a small, cool, very faint, main sequence star whose surface temperature is under about 4,000 K.
What color star is hottest?
White stars are hotter than red and yellow. Blue stars are the hottest stars of all.
What are star clusters called?
A star cluster is a group of stars that share a common origin and are gravitationally bound for some length of time. ... The two basic categories of stellar clusters are open clusters, also known as galactic clusters, and globular clusters.
What are the different types of star clusters?
There are three types of star clusters: globular, open, and associations .
Which of these star clusters is oldest?
A team of astronomers using the Gemini-South telescope has discovered one of the oldest stellar clusters in the Milky Way. The team’s results date the globular cluster, named HP 1 , at about 12.8 billion years, making its stars among the oldest ever found in our Galaxy.
Where is Betelgeuse on the HR diagram?
Betelgeuse in the constellation Orion — X-axis: 3000K, Y-axis 10 5 M. Polaris, the north pole star — X-axis: 6000K, Y-axis between 10 3 and 10 4 M. Sirius, the brightest star visible from Earth after the Sun — X-axis: 9000K, Y-axis 10 and 10 2 M.
Where is Betelgeuse located on the HR diagram?
Two of the brightest stars in the evening sky lie at opposite corners of the rectangle: bright orange-red Betelgeuse at the northeastern corner (upper left in the photo) and even brighter Rigel at the southwest (lower right in the photo).
