What are good astronomy questions?
General Astronomy Questions
- What is the difference between astronomy and astrology?
- Do I need an expensive telescope to enjoy astronomy?
- How does a telescope work?
- Why can't I see very many stars at night?
- Where does space begin?
- Why is the sky blue?
- Why is the sky dark at night?
- What is the speed of light?
What are some questions about the universe?
Many of the biggest puzzles in astronomy and cosmology have been solved. Take the age of the universe. A century ago, we could say only that the universe was very old. There was no way to find a precise number....
- What is Dark Matter? ...
- What is Dark Energy? ...
- What Came Before the Big Bang?
What is the weirdest thing found in space?
Top 10 Strangest Things in Space
- Cosmic Microwave Background. NASA/WMAP Science Team. ...
- Dark Matter. Andrey Kravtsov. ...
- Exoplanets. ESO. ...
- Gravity Waves. Henze/NASA. ...
- Galactic Cannibalism. NASA; ESA; Z. ...
- Neutrinos. The Asahi Shimbun/Getty. ...
- Quasars. NASA-MSFC. ...
- Vacuum Energy. NASA-JSC.
What is the most beautiful thing in space?
Eye candy from space: The most beautiful panoramas and photos of the universe around us
- Spacewalkin' in a winter wonderland. Credit: NASA. ...
- Pismis 24-1. ...
- The spice must flow. ...
- Mystic Mountain. ...
- The Pinwheel Galaxy. ...
- Stellar nursery in Centaurus. ...
- The Eagle Nebula. ...
- The Medusa Nebula.
What is the biggest thing in space?
Containing more than 8,000 galaxies and with a mass of more than 10 million billion times that of the sun, the Shapley Supercluster is the largest structure in the local universe, according to the European Space Agency.
Is 0 Kelvin possible?
Summary: On the absolute temperature scale, which is used by physicists and is also called the Kelvin scale, it is not possible to go below zero – at least not in the sense of getting colder than zero kelvin. ... At zero kelvin (minus 273 degrees Celsius) the particles stop moving and all disorder disappears.
What is the hottest thing in earth?
By zapping a piece of aluminum with the world's most powerful x-ray laser, physicists have heated matter to 3.
How cold is absolute zero?
Stranger still, absolute zero isn't even zero on the temperature scales used by nonscientists. It's minus 273.
Why is it called absolute zero?
You can think of thermal motion as perfectly unordered atomic motion and object motion as perfectly ordered atomic motion. ... This point, where all the atoms have been completely stopped relative to each other, is known as "absolute zero" and corresponds to the number zero on the Kelvin temperature scale.
What is equal to absolute zero?
Absolute zero, temperature at which a thermodynamic system has the lowest energy. ... It corresponds to −273.
What is the hottest temp?
The official highest recorded temperature is now 56.
How do you find absolute zero?
To solve for the value of absolute zero, use the equation for a line, y = mx + b. Absolute zero is the temperature at which the gas's pressure equals zero. This is the line's x-intercept. To calculate this value, set y = 0, substitute in the value of the slope, and solve for x.
Why do we use absolute temperature?
Sometimes it is necessary to use absolute temperatures. Absolute temperature scales have as their zero point the lowest temperature believed possible. Absolute temperature is used in application of the ideal gas law and many other laws of thermodynamics.
Why does pressure increase with temperature?
The temperature of the gas is proportional to the average kinetic energy of its molecules. Faster moving particles will collide with the container walls more frequently and with greater force. This causes the force on the walls of the container to increase and so the pressure increases.
Does pressure increase with height?
As altitude rises, air pressure drops. In other words, if the indicated altitude is high, the air pressure is low. This happens for two reasons. ... As altitude increases, the amount of gas molecules in the air decreases—the air becomes less dense than air nearer to sea level.
Does heating gas increase pressure?
If you heat a gas you give the molecules more energy so they move faster. This means more impacts on the walls of the container and an increase in the pressure. Conversely if you cool the molecules down they will slow and the pressure will be decreased.
Why does pressure increase when volume increases?
Because the volume has decreased, the particles will collide more frequently with the walls of the container. ... More collisions mean more force, so the pressure will increase. When the volume decreases, the pressure increases. This shows that the pressure of a gas is inversely proportional to its volume.
What happens to the pressure when the volume is cut in half?
For a fixed mass of an ideal gas kept at a fixed temperature, pressure and volume are inversely proportional. ... Therefore, when the volume is halved, the pressure is doubled; and if the volume is doubled, the pressure is halved.
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