Mama, Where Do Galaxies Come From?

The video explores the evolution and study of galaxies, focusing on the role of ultraviolet (UV) light in understanding their life cycles. It highlights the contributions of the Galaxy Evolution Explorer (Galex) in capturing UV light to study galaxies' evolution from blue spirals to red ellipticals. The video also discusses significant discoveries made by Galex, such as the formation of stars in unexpected regions and the reanimation of dead galaxies by acquiring new gas. These findings have provided valuable insights into the life and evolution of galaxies.

What type of light is crucial for understanding the age and formation of galaxies?

• Infrared light

• Ultraviolet light

• X-ray light

• Microwave light

What was the primary mission of the Galex telescope?

• To observe X-ray emissions

• To capture ultraviolet wavelengths

• To study infrared wavelengths

• To capture visible light

How did Galex's field of view compare to other telescopes?

• It was significantly wider than most telescopes

• It was slightly wider than the Hubble Space Telescope

• It was about the same as other telescopes

• It was narrower than most telescopes

What evidence did Galex provide about the evolution of galaxies?

• Galaxies evolve from red ellipticals to blue spirals

• Galaxies remain unchanged over time

• Galaxies do not emit ultraviolet light

• Galaxies evolve from blue spirals to red ellipticals

What did Galex discover about the formation of stars in the galactic outer regions?

• Stars cannot form in the outer regions

• Stars can form in the outer regions

• Star formation is identical in all regions

• Only massive stars form in the outer regions

How can 'dead' galaxies reanimate according to Galex's findings?

• By forming new stars internally

• By increasing their mass

• By acquiring gas from intergalactic space

• By merging with other galaxies

How long did the Galex mission last?

• 29 months

• 15 years

• 5 years

• 10 years