Telescopes and Observations - The Universe

What did Galileo observe using his refracting telescope?

• The rings around Saturn

• The mountains on the Moon

• The four moons orbiting Jupiter

• The fine detail of distant objects

Why do large telescopes use mirrors instead of lenses?

• Mirrors are easier to make than lenses

• Mirrors can collect more light than lenses

• Mirrors provide better resolution than lenses

• Mirrors are more durable than lenses

Where are most optical telescopes located?

• In populated cities

• In deep isolated valleys

• In remote mountain tops

• At high altitudes

What do radio telescopes detect?

• Visible light from distant objects

• Radio waves from excited hydrogen atoms

• Infrared radiation from stars

• Ultraviolet radiation from galaxies

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Why are radio telescopes located away from large populations?

• To avoid interference from radio signals

• To reduce atmospheric & light disturbance

• To improve resolution

• To detect faint radio signals

What advantage do space telescopes have over ground-based telescopes?

• They can gather clearer images

• They can detect radio waves

• They are larger in size

• They are more affordable

What is the main mirror diameter of the Hubble Space Telescope?

• 2.4 m

• 1.5 km

• 547 km

• 6.5 m

Draw your best attempt of a radio telescope

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