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10The sky observed at night contains planets, stars, and comets.
Dust particles and air molecules are not part of the universe.
The boundless view of the sky is called space.
The observable universe has a diameter of 46 million light years.
One light year is the distance travelled by light in one year through a vacuum.
The universe is estimated to be 13.8 billion years old.
Edwin Hubble discovered that the universe is shrinking.
George Lemaitre proposed the concept of the ‘Primeval atom’.
Big Bang theory explains the expansion of the universe from a dense point.
Astronomy is the study of living beings on Earth.
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The branch of science that studies the universe is:
The universe is estimated to be how old?
The distance travelled by light in one year is called:
Edwin Hubble discovered: 2) 3) 4)
The explosion that started the universe is called:
The concept of the Primeval atom was proposed by:
Stephen Hawking explained the origin of the universe from:
Heavenly bodies include:
The observable universe is the part that:
Comets, meteors, and asteroids are considered:
The boundless view of the sky is called ______.
The aggregate form of space, time, matter, and energy is the ______.
The distance travelled by light in one year is called ______ year.
The observable universe has an estimated diameter of ______ billion light years.
______ Hubble discovered a spiral nebula moving away from Earth.
George Lemaitre proposed the concept of the ______ atom.
The explosion of the Primeval atom is called ______ Bang.
After the Big Bang, ______ were formed from subatomic particles.
Nebulas, galaxies, and stars were formed from ______.
The study of the universe is called ______.