Exploring Galaxies and Telescopes

The video explores the vastness of the universe, starting with the Milky Way as our cosmic home. It highlights Edwin Hubble's groundbreaking discovery in 1924 that revealed galaxies beyond the Milky Way. The Hubble Deep Field in 1995 provided the first deep look into the universe, estimating 120 billion galaxies in the observable universe. Recent analyses suggest this number is at least 10 times too low, with 90% of galaxies too faint to be observed by current telescopes. The video concludes with the potential of future observations by the James Webb Space Telescope and the European Southern Observatory.

What is the Milky Way galaxy?

• A black hole

• A single star

• A planet

• Our cosmic home galaxy

Who discovered that there are galaxies beyond the Milky Way?

• Edwin Hubble

• Galileo Galilei

• Albert Einstein

• Isaac Newton

In what year did Edwin Hubble make his groundbreaking discovery?

• 1905

• 1924

• 1969

• 1945

What was the significance of the Hubble Deep Field observed in 1995?

• It measured the distance to the moon

• It found water on Mars

• It revealed hundreds of previously unseen galaxies

• It discovered the first black hole

How many galaxies were initially estimated to be in the observable universe?

• 10 billion

• 200 billion

• 50 billion

• 120 billion

What is the cosmological horizon?

• The boundary of our solar system

• The distance to the nearest star

• The limit beyond which the universe continues but is unobservable

• The edge of the Milky Way

What percentage of galaxies are too faint and distant to be observed by current telescopes?

• 75%

• 50%

• 10%

• 90%

How far back in time have astronomers been able to look with the newly collected data?

• 1 billion years

• 5 billion years

• More than 13 billion years

• 10 billion years

What was the density of galaxies in the early universe compared to today?

• The same

• 5 times higher

• 10 times lower

• 10 times higher

Which upcoming telescope is mentioned as continuing the exploration of the universe?

• Kepler Space Telescope

• Chandra X-ray Observatory

• James Webb Space Telescope

• Spitzer Space Telescope