Explanation

The lowest layer of Earth's atmosphere is called the troposphere.

This layer contains about 75-80% of the atmosphere's total mass and up to 99% of its water vapor. 

Explanation

Sunlight is composed of a spectrum of light 

A spectrum revealed by Isaac Newton using a prism

That includes seven colors, which are (ROYGBIV)

1. Red
2. Orange
3. Yellow
4. Green
5. Blue
6. Indigo
7. Violet

Explanation

• Minor objects with irregular shapes orbiting the Sun are called asteroids,
• It is also known as a minor planet
• They are found mainly in the asteroid belt between Mars and Jupiter.

Explanation

Explanation

The study of the universe's origin, nature, and evolution is called Cosmology

Edwin Powell Hubble is called the father of Cosmology.

The term cosmology was first used in English in 1656 in Thomas Blount's Glossographia, with the meaning of "a speaking of the world"

Explanation

Etymology is the study of the origin of words.

At its most basic level, etymology is the study of a word's history

Explanation

Astronomy is the science that deals with stars, planets, moons, and all objects beyond Earth’s atmosphere.

It helps in understanding the origin, evolution, and structure of the universe.

Explanation

The Steady State theory proposes that the universe has no beginning or end in time.

It suggests that as the universe expands, new matter is continuously created to maintain a constant density.

This theory was proposed by Fred Hoyle, Thomas Gold, and Hermann Bondi in 1948

Explanation

The first Canadian woman in space was Dr. Roberta Bondar

flew on the Space Shuttle Discovery (STS-42) in January 1992

She is a neurologist and scientist

Bondar was born in Sault Ste. Marie, Ontario, on December 4, 1945

Explanation

Neptune is the eighth and farthest planet from the Sun in our solar system.

It takes approximately 165 Earth years to complete one orbit around the Sun.

• Neptune: ~165 Earth years
• Uranus: ~84 Earth years
• Saturn: ~29.5 Earth years
• Jupiter: ~12 Earth years
• Mars: ~687 Earth days (1.88 years)
• Earth: 365.25 days
• Venus: ~225 Earth days
• Mercury: ~88 Earth days