Explanation

The Milky Way is the galaxy that contains our solar system

It consists of 100–400 billion stars

The Milky Way is a huge collection of: 

• stars
• dust
• gas

It is visible as a hazy band of white light

Additional Information

The nearest galaxy to our Milky Way is Andromeda

Largest galaxy in the Universe is a Spiral galaxy 

Explanation

The nucleus is primarily composed of protons and neutrons, collectively called nucleons.

Explanation

• The mass number (represented by the letter A) is defined as the total number of protons and neutrons in an atom.
• Consider the table below, which shows data from the first six elements of the periodic table.
• Consider the element helium.
• Its atomic number is 2, so it has two protons in its nucleus.

Explanation

Arteries carry oxygen-rich blood away from the heart. They are hard on the outside, but  contain a smooth inner layer of epithelial cells to facilitate blood flow. The arteries also contain a strong, muscular middle layer that helps pump blood throughout the body. Capillaries connect  arteries to veins.

MUG 11-12-2022

Explanation

• Our universe become born about thirteen.7 billion years in the past in a huge expansion that blew area up like a massive balloon.
• That, in a nutshell, is the big Bang theory, which truly all cosmologists and theoretical physicists suggest.
• The evidence helping the idea is considerable and convincing.
  

Explanation

The distance traveled by a body in unit time is called the speed of the body.

S.I. unit of speed is meter per second (ms−1).

ND11623