Universo

The video tutorial explores the universe, describing it as everything that exists, including planets, stars, and galaxies. It explains the structure of the universe, highlighting solar systems and galaxies, and discusses the universe's immense size and continuous expansion. The Big Bang theory is presented as the scientific explanation for the universe's origin, detailing how it expanded from a concentrated mass. The video concludes by prompting viewers to consider how scientists determine the universe's age.

What is the universe composed of?

• Only the Earth and its atmosphere

• Just galaxies and solar systems

• Everything that exists, including matter and energy

• Only stars and planets

How is a solar system defined?

• A group of galaxies

• A collection of stars

• A group of planets and other bodies orbiting a star

• A single planet with its moons

What is a light-year?

• The age of a star

• The brightness of a star

• The distance light travels in one year

• The time it takes for light to travel around the Earth

What event is believed to have started the universe?

• The formation of the Earth

• The Big Bang

• The creation of the Milky Way

• The collision of two galaxies

How did the universe expand according to the Big Bang theory?

• From a concentrated mass smaller than a pinhead to larger than a galaxy

• From a single star to multiple galaxies

• From a small planet to a large solar system

• From a large galaxy to a small pinhead

What continues to happen to the universe today?

• It is collapsing inward

• It continues to expand outward

• It is shrinking

• It remains static

What question should we consider about the universe's age?

• How do scientists determine the age of the universe?

• How do scientists measure the distance to the sun?

• How many stars are in a galaxy?

• What is the size of the Milky Way?