Explanation

Light year refers to speed of light expressed in miles per year

(it is about ten trillion kilometers or six trillion miles).

Light year is a unit of distance.

Light Year: the distance that light can travel in one year. 

The distance light travels in one year is known as the light year.

Explanation

The Sun is a star.

There are lots of stars, but the Sun is the closest one to Earth.

It is the center of our solar system.

The Sun is a hot ball of glowing gases.

The sun is composed of layers made up almost entirely of hydrogen and helium.

AGM 09-2-2023

Explanation

• Galileo Galilei is credited with creating his own improved version of the telescope in 1609, based on the design of the "Dutch perspective glasses".
• Although he did not invent the telescope, his improvements to the design and his astronomical discoveries using the telescope made him a key figure in its history.

Explanation

• A telescope is an instrument that gathers light from distant sources.
• Such as stars, planets, galaxies, and other celestial objects.
• It allowing us to study and observe them in greater detail.

Explanation

• A constellation is a group of stars that, when viewed from Earth, form a pattern or shape that is recognizable.
• It has been given a specific name, such as Orion, Cassiopeia, or Ursa Major.

Explanation

• A black hole is a region of space where matter has collapsed in on itself.
• It creating an incredibly dense and gravitational field so strong that not even light can escape.

Explanation

• Nebulae are primarily made up of Hydrogen (97%) and Helium (3%).
• These vast clouds of gas and dust serve as the birthplace of stars, with hydrogen being the most abundant element in the universe.

Explanation

• Light from the Sun takes about 8 minutes to reach Earth due to the short distance of approximately 93 million miles.
• Light from Sirius, which is much farther away at about 8.6 light-years, takes approximately 8 years to reach us.

Explanation

Our solar system takes approximately 250 million years to complete one orbit around the Milky Way galaxy.

Explanation

The Earth and the Sun are approximately 25,000 light-years away from the center of the Milky Way galaxy.