Contest Alert 🚨 📢 | The Science of Space

Peace be upon to everyone! Here is @safdarali and I am quite well with your love and prayers. How are you my steemit fellow? First of all I am thankful to dear brother who is created this new and informative contest.This contest is very unique and I going to participate in this contest, this is the reason, I am here today. This weekly contest arranged by my dear steemian @chasad75 , which have title

"Contest Alert 🚨 📢 | The Science of Space"

I am very thankful to him for conducting these wonderful contest.

1. Briefly explain the difference between a comet and an asteroid.

Comet:
A comet is a space traveling, large, dirty snowball. It is composed of gas, ice, rock, and dust. Some of the ice on a comet turns into gas when it approaches the Sun due to solar radiation. The comet develops a coma, or luminous cloud and occasionally a dazzling tail is also visible. When comets approach the Sun, their long, brilliant tails can be seen from Earth.

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Asteroid:
On other hand an asteroid resembles a little piece of rock. It is in space too, but it is made of metal and rock. Asteroid is in size from microscopic pebbles to larger objects spreading many kilometers. On other hand some of them can approach Earth. Most of them are located in the asteroid belt. It lies between Mars and Jupiter.

Freepik

2. What is the name of the closest star to Earth, other than the Sun, and in which constellation is it located?

There are many stars wondering near the Sun. The name of closest star to earth, other than Sun is Proxima Centauri. Proxima ventauri is the star which is located inside the Centaurus constellation. We called these stars as proxima centauri. These are also called alpha centauri. These stars form alpha centauri A and B. The distance of proxima star is about 4.24 light years, this star is closest to Earth.

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3. Name one of the moons of Jupiter and describe one interesting feature about it.

Name of one moon of Jupiter is Europa. According to scientists think Europa have an ocean under its frozen surface. It is an intriguing aspect of the planet. It is believed that there may be circumstances in this ocean that might support life, making it potentially livable. Researchers are eager to investigate Europa
more thoroughly in order to discover more about its secret ocean and the potential for extraterrestrial
life.

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4. What is a light-year, and why is it used as a unit of measurement in astronomy?

Light year is a unit of measurement used to express distance in astronomy. It is the equal of 9.46 trillion kilometers or 5.88 trillion miles, in which light travels in a single Earth year.
Space is so large, that is why astronomer measure distance in light years instead of kilometers or miles, which would become quite cumbersome for measuring such great distances. According to scientists the speed of light traveling is 300,000 km/s. It takes for light to travel, we can determine the distances between objects in space.

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