Astronomy - Scioly.org
... 23. All stars are composed of mostly hydrogen and helium, yet many stars have no lines for hydrogen or helium in their spectrum. What causes this apparent contradiction? a. Spectral lines are created in the lower atmospheres of stars, and for many stars hydrogen and helium are hidden below the atmo ...
... 23. All stars are composed of mostly hydrogen and helium, yet many stars have no lines for hydrogen or helium in their spectrum. What causes this apparent contradiction? a. Spectral lines are created in the lower atmospheres of stars, and for many stars hydrogen and helium are hidden below the atmo ...
DTU9ePPTChap13 - Faculty Lounge : Astronomy
... reactions. These reactions include carbon fusion, neon fusion, oxygen fusion, and silicon fusion. This last fusion eventually produces an iron core. A high-mass star dies in a supernova explosion that ejects most of the star’s matter into space at very high speeds. This Type II supernova is triggere ...
... reactions. These reactions include carbon fusion, neon fusion, oxygen fusion, and silicon fusion. This last fusion eventually produces an iron core. A high-mass star dies in a supernova explosion that ejects most of the star’s matter into space at very high speeds. This Type II supernova is triggere ...
Lecture 4a - University of Rochester
... restricted to atmospheric windows of transmission. • Atmospheric windows exist (where the atmosphere is transparent) in the radio, submillimeter, near+mid-infrared and optical. • The atmosphere is opaque in the far-infrared, UV, X-ray, and low frequency radio. Astronomy at these wavelengths is done ...
... restricted to atmospheric windows of transmission. • Atmospheric windows exist (where the atmosphere is transparent) in the radio, submillimeter, near+mid-infrared and optical. • The atmosphere is opaque in the far-infrared, UV, X-ray, and low frequency radio. Astronomy at these wavelengths is done ...
ref H-R Spectral types
... South Wales. Aracturus is the brightest star in the constellation Bootes, the Bear Driver. ...
... South Wales. Aracturus is the brightest star in the constellation Bootes, the Bear Driver. ...
Powerpoint of lecture 1
... Galactic cluster HR diagrams (Handout 3) Much more variety, but all diagrams show • Dominant main sequence, of varying length • Some giant stars, in variable numbers If all main sequences are the same (i.e. have the same absolute magnitude at a given temperature), then can create a composite HR dia ...
... Galactic cluster HR diagrams (Handout 3) Much more variety, but all diagrams show • Dominant main sequence, of varying length • Some giant stars, in variable numbers If all main sequences are the same (i.e. have the same absolute magnitude at a given temperature), then can create a composite HR dia ...
TYPES OF STARS
... First, we will classify stars based on the "strength" of their H lines. Look at the spectra of the seven stars at the end of this worksheet. Using their spectra, rank the seven stars according to the strength of their Hα lines. If you can't rank them all easily, try coloring in the area between the ...
... First, we will classify stars based on the "strength" of their H lines. Look at the spectra of the seven stars at the end of this worksheet. Using their spectra, rank the seven stars according to the strength of their Hα lines. If you can't rank them all easily, try coloring in the area between the ...
Life cycle of low mass stars
... massive star that occurs when its core runs out of nuclear fuel creating a gravitational collapse. ...
... massive star that occurs when its core runs out of nuclear fuel creating a gravitational collapse. ...
D1 Stellar quantities (PPT)
... They have a flat rotating disc-shape with spiral arms spreading out from a central galactic bulge that contains the greatest density of stars. It is increasingly speculated that, at the centre of the galactic bulge, there is a black hole. The spiral arms contain many young blue stars and a great dea ...
... They have a flat rotating disc-shape with spiral arms spreading out from a central galactic bulge that contains the greatest density of stars. It is increasingly speculated that, at the centre of the galactic bulge, there is a black hole. The spiral arms contain many young blue stars and a great dea ...
Click here to the PowerPoint
... b) SHORTER its lifespan – they get through their fuel more quickly Stars around the same mass as our sun last ...
... b) SHORTER its lifespan – they get through their fuel more quickly Stars around the same mass as our sun last ...
Unit 3 - Lesson 8.9 Life of Stars Challenge
... This catastrophic event is thought to be main source of elements heavier than hydrogen and helium A mass similar to that of the Sun, but only 1% of the Sun's diameter (approximately the diameter of the Earth). These form from massive stars at the end of their life times Star type consists of degener ...
... This catastrophic event is thought to be main source of elements heavier than hydrogen and helium A mass similar to that of the Sun, but only 1% of the Sun's diameter (approximately the diameter of the Earth). These form from massive stars at the end of their life times Star type consists of degener ...
SAMPLE TEST: Stars and Galaxies Multiple Choice Identify the letter
... ____ 24. Massive stars terminate in a brilliant explosion called a ____. a. red giant c. neutron star b. protostar d. supernova ____ 25. Which stars are composed of matter in which electrons have combined with protons? a. black holes c. white dwarfs b. black dwarfs d. neutron stars ____ 26. All star ...
... ____ 24. Massive stars terminate in a brilliant explosion called a ____. a. red giant c. neutron star b. protostar d. supernova ____ 25. Which stars are composed of matter in which electrons have combined with protons? a. black holes c. white dwarfs b. black dwarfs d. neutron stars ____ 26. All star ...
Measuring Stars
... Star A and star B are equally bright, but star A is farther away. Which one is actually more luminous? A) Star A B) Star B C) They are equally luminous D) There is insufficient information ...
... Star A and star B are equally bright, but star A is farther away. Which one is actually more luminous? A) Star A B) Star B C) They are equally luminous D) There is insufficient information ...
Chapter 21
... One Astronomical Unit (AU) = 150,000,000 km And, one light year (LY)= 9.5 trillion km (9,500,000,000,000 km) ...
... One Astronomical Unit (AU) = 150,000,000 km And, one light year (LY)= 9.5 trillion km (9,500,000,000,000 km) ...
Stars - winterk
... Stars are created in a nebula as the gases contract due to the force of gravity, turning into a hot, dense clump As they become larger, they heat up until they reach a temperature of 10 000 000 C At this temperature, nuclear fusion begins ...
... Stars are created in a nebula as the gases contract due to the force of gravity, turning into a hot, dense clump As they become larger, they heat up until they reach a temperature of 10 000 000 C At this temperature, nuclear fusion begins ...
Lecture 7: The Sun - Department of Physics and Astronomy
... contracting. Energy produced by nuclear fusion balances energy radiated into space. Energy heats gas, maintaining pressure. The sun is in equilibrium ...
... contracting. Energy produced by nuclear fusion balances energy radiated into space. Energy heats gas, maintaining pressure. The sun is in equilibrium ...