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Astronomy

The scientific study of celestial bodies. Find questions on Constellations, Planets and more.

500 Questions

Is Carlos Noriega dead?

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yes

How many shooting lanes can you make in shooting range?

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The number of shooting lanes in a shooting range can vary depending on the size and design of the range. Some smaller ranges may have only a few lanes, while larger and more professional ranges can have 20 or more lanes. It ultimately depends on the specific facility and its layout.

Why are meteors mistakenly called shooting stars and what are they are made of?

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Meteors are mistakenly called shooting stars because they appear as streaks of light in the sky when they enter Earth's atmosphere and burn up. They are not actually stars, but small rocky or metallic objects, often debris from comets or asteroids, that collide with Earth's atmosphere. As they heat up from the friction, they vaporize and create the glowing trails we see.

What are the similarities between rotation and revolution?

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well the difference is rotation is around an axis in the center of a body. revolution is the movement of a body around an axis outside of the body ( earth is the body then the sun is the axis.

What does smile as bright as the sun mean?

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her smile is wsncjsnzbj ns

Is there such a thing as warp speed?

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Not in our present understanding of physics. In all of our present mainstream physics' rulesets, in order for any object with mass to travel at the speed of light, it would require infinite energy, and that is just not going to happen. Don't even begin to think about going faster than light.

That said, there are always new things "just around the corner", but consider this... If faster than light travel were possible, why haven't we been visited by extraterrestrial beings? Hmmm...

How much mass does earth have?

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The Earth doesn't "weigh" anything, because the concept of weight only applies to a body which is resisting a gravitational field. The Earth is in free orbit around the Sun.

The MASS of the Earth is approximately 5.97e24 kilograms, or 5,970,000,000,000,000,000,000,000 kg.

This is approximately 13e24 pounds, or 1,300,000,000,000,000,000,000,000 pounds.

What is a low mass star (main sequence)?

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A star with a low mass will go through these stages:

1. Protostar nebula

2. Main sequence (as a red dwarf)

3. Red giant

4. Planetary nebula

5. White dwarf

(6. Black dwarf is theorized to occur after white dwarf)

What hemisfar does eart have?

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Earth has two hemispheres - the Northern Hemisphere and the Southern Hemisphere. The Northern Hemisphere is north of the equator and the Southern Hemisphere is south of the equator. The equator which cuts the globe in half is an imaginary line that divides the Earth into two equal halves.

  • Northern Hemisphere:
    • Includes North America Europe Asia and the northern part of Africa
    • Has colder climates
    • Has longer days in the summer
  • Southern Hemisphere:
    • Includes South America Australia Antarctica and the southern part of Africa
    • Has warmer climates
    • Has longer days in the winter

Both hemispheres share the same land mass and the same oceans. Even though the hemispheres are divided by the equator they are interconnected and share many characteristics.

When we look into the sky we are actually looking into the past how do you explain that?

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we are looking into the past all the time

Jill

What is the earth orbit velocity?

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The mean orbital velocity of Earth is about 29.783 kilometers per second. That's the speed the planet is moving through space in its orbit about the sun. Earth's speed varies a bit because its orbit is slightly eccentric, but that's why we say meanorbital velocity.

One can calculate this value by knowing two facts:

1. The earth is approximately 150 million km from the sun (mean distance) and travels approximately in a circular orbit

2. It takes one year for the earth to complete one orbit around the sun

Using (1), we can calculate the circumference of the earth's orbit (C) using 2piR, where R is the mean radius. This gives us

C ~ 300pi million km

for the total distance traveled in one year. One can calculate the number of seconds in a year by

T = 365 days/year *24 hours/day*60 minutes/hour*60 seconds/minute

This is very close to 10pi million seconds (within 0.3%). The mean speed is then given by:

V = C/T ~ 30 km/sec

As can be seen, this simple calculation is within 1% of the accepted value.
30 kilometers/second.

What is sample universe?

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A sampling universe is what a sample is intended to represent.

What is 1 billion light years from earth?

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Not much that we can see. The best candidate would probably be the Sloan Great Wall, which is a vast collection of galaxies and which was once thought to be the largest structure in the universe.

What is State Theory?

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The idea that the state governments, not the national government, are supreme and therefore have the right to nullify any act of the national government.

What is light year A parsec?

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"Light-year" and "parsec" are two units of length used in astronomy - for distant objects. 1 parsec = 3.26 light-years.

A light-year is defined as the distance that light travels in a year.

A parsec is defined as the distance at which an object would have to be to have a parallax of one arc-second.

Where does the Sun rise and sun set?

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The sun rises in the east and sets in the west - at least that's how we perceive it due to the rotation of the earth. Of course the sun isn't really "rising" and "setting", it's just that the Earth is rotating such that the direction to the sun for a person at a stationary point on the ground changes from east of them at sunrise to west of them at sunset.

What does an h-r diagram relate a stars temperature to?

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The temperature is displayed along the horizontal axis while the vertical axis is the star's absolute magnitude. So the HR diagram is a scatter diagram relating temperature and brightness, and eah star occupies one point.

What does the equinoxes mark?

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In the northern hemisphere, the autumnal equinox marks the first day of fall. An equinox happens twice a year, when the sun shines directly on the equator and the length of day and night is nearly equal.

What type of star has a high temperature and a high luminosity?

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A white dwarf.

A white dwarf.

A white dwarf.

A white dwarf.

What is the sun's day?

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Sunday

Why is the universe?

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There is an assumption in your question which is actually incorrect: that the Universe is infinite. Recent scientific discoveries have confirmed that the Universe actually does end and we cannot see beyond it. Such attempts only allow us to glance the Universe in its very early stages. (If you look at something 13 billion light years away, you see it as it was 13 billion years ago.)