Capitolul 1

Universe

The totality of matter, energy, radiation, and time, which is vast and complex and is continuously expanding.

Galaxies

Giant structures formed from stars, cosmic dust, and gas, held together by gravity.

Milky Way

Our galaxy, which is spiral in shape and contains over 100 billion stars.

Dark matter

Invisible matter that makes up about 27% of the universe, detected only through gravitational effects.

Dark energy

A mysterious force that constitutes about 68% of the universe and drives its accelerated expansion.

Solar System

A system consisting of the Sun and all the celestial bodies that orbit it, including planets, moons, asteroids, and comets.

Planets

Celestial bodies orbiting a star, which in our case includes Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune.

Asteroids

Rocky objects found in space, primarily located in the asteroid belt between Mars and Jupiter.

Comets

Ice and dust bodies that develop a luminous tail when approaching the Sun.

Meteorites

Fragments from space that enter Earth's atmosphere and burn up, producing shooting stars.

Sun

The central star of the Solar System, producing energy through nuclear fusion of hydrogen into helium.

Gravity

The force that shapes the structure of the universe and influences the motion of celestial bodies.

Constellations

Apparent groupings of stars in the night sky, used for navigation but not physically related.

Ceres

The largest object in the asteroid belt, classified as a dwarf planet.

Auroras

Natural light displays caused by the solar wind interacting with Earth's magnetic field.

What is dark matter?

Invisible matter that makes up about 27% of the universe, detected only through gravitational effects.

What is the Solar System?

A system consisting of the Sun and all the celestial bodies that orbit it, including planets, moons, asteroids, and comets.

The center of the Solar System is the _____, which produces energy through nuclear fusion.

Sun

What is the Solar System?

A system consisting of the Sun and all the celestial bodies that orbit it, including planets, moons, asteroids, and comets.