Show:
Stars
Doppler Affect
Galaxies
How Stars Form
Mr.Quenzer Only
100
A Latin word for cloud
What is Nebula
100
commonly heard when a vehicle sounding a siren or horn approaches, passes, and recedes from an observer. The received frequency is higher during the approach, it is identical at the instant of passing by, and it is lower during the recession.
What is the Doppler Affect
100
The most massive galaxies in the sky are giant
What is elliptical galaxies
100
a balance, in this case a balance between gravity pulling atoms toward the center and gas pressure pushing heat and light away from the center
What is equilibrium
100
the most widely recognized astronomical objects, and represent the most fundamental building blocks of galaxies.
What is a star
200
The theory that the universe began with a tremendous explosion
What is the Big Bang Theory
200
Another use of the Doppler effect, which is found mostly in plasma physics and astronomy, is the estimation of the temperature of a gas (or ion temperature in a plasma)
What is spectral line
200
a massive, gravitationally bound system consisting of stars, stellar remnants, an interstellar medium of gas and dust, and an important but poorly understood component called dark matter
What is a Galaxy
200
When a star gets old it starts to die out, but it depends upon its initial mass. When the star dies it becomes a huge explosion and it can make a.......
What is a black hole
200
stars are responsible for the manufacture and distribution of heavy elements such as carbon, nitrogen, and oxygen, and their characteristics are intimately tied to the characteristics of the planetary systems that may coalesce about them. Consequently, the study of the birth, life, and death of stars is central to the field of astronomy.
What is a stars life cycle
300
When you look at white light through a glass prism, you see a rainbow of colors
What is Spectrum
300
The distance between successive wave fronts is increased, so the waves
How does the waves spread out
300
a rotating disk of stars and interstellar medium, along with a central bulge of generally older stars
What is Spiral Galaxies
300
For the most part, hydrogen in the core is gone. If the star wants to maintain equilibrium between
What does gravity and gas pressure do when a hydrogen in a star is gone
300
A star the size of our Sun requires about 50 million years to mature from the beginning of the collapse to adulthood. Our Sun will stay in this mature phase (on the main sequence as shown in the Hertzsprung-Russell Diagram) for approximately 10 billion years
How Long can a sun live long
400
At the end of it's life, a massive star may explode in a large bright flash
What is Supernova
400
Among the nearby stars, the largest radial velocities with respect to the Sun are +308 km/s (BD-15°4041, also known as (Mr.Quenzer can only answer)
LHS 52, 81.7 light-years away and -260 km/s
400
About 300,000 years after this event, atoms of hydrogen and helium began to form.
What is recombination
400
Stars are born within the clouds of dust and scattered throughout most galaxies. A familiar example of such as a dust cloud is the
What is Orion Nebula
400
Stars are fueled by the nuclear fusion of hydrogen to form helium deep in their interiors. The outflow of energy from the central regions of the star provides the pressure necessary to keep the star from collapsing under its own weight, and the energy by which it shines.
What does a star use
500
A star's atmosphere absorbs color of light instead of emitting them, the spectrum of a star
What is Absorption Spectrum
500
The Doppler affect was named after this person
Who is Christian Doppler
500
they are very thin, rotate rapidly, and often show spiral structure.
What is disk galaxies/spiral galaxies
500
As the cloud collapses, the material at the center begins to heat up
What is a protostar
500
If the collapsed stellar core is larger than three solar masses, it collapses completely to form a black hole: an infinitely dense object whose gravity is so strong that nothing can escape its immediate proximity, not even light. Since photons are what our instruments are designed to see, black holes can only be detected indirectly. Indirect observations are possible because the gravitational field of a black hole is so powerful that any nearby material - often the outer layers of a companion star - is caught up and dragged in. As matter spirals into a black hole, it forms a disk that is heated to enormous temperatures, emitting copious quantities of X-rays and Gamma-rays that indicate the presence of the underlying hidden companion
What is a black hole