How can Hubble see distant galaxies clearly, but not Pluto?

The video explains why the Hubble Space Telescope can capture clear images of distant galaxies but struggles with nearby objects like Pluto. This is due to the concept of angular diameter, which affects how large objects appear in the sky. The Andromeda Galaxy, despite being far away, appears large due to its size. In contrast, Pluto's small angular diameter makes it difficult to image. The video also discusses how astronomers measure celestial sizes using degrees, arcminutes, and arcseconds. The New Horizons mission provided detailed images of Pluto, which Hubble couldn't achieve. A visual analogy is used to illustrate these concepts, concluding the explanation.

Why does Hubble struggle to capture clear images of Pluto compared to distant galaxies?

• Pluto has a smaller angular diameter.

• Pluto is too close to Earth.

• Hubble is not designed for close objects.

• Galaxies emit more light than Pluto.

What is the apparent size of the Andromeda Galaxy in the night sky?

• 30 arcminutes

• 0.11 arcseconds

• 1 degree

• 3 degrees

How does Hubble manage to capture the entire Andromeda Galaxy?

• By using a special filter for large objects

• By zooming out to fit the whole galaxy

• By creating a mosaic of multiple images

• By using a single wide-angle lens

What unit is used to describe the size of celestial objects in the sky?

• Light years

• Kilometers

• Degrees, arcminutes, and arcseconds

• Parsecs

Why was the New Horizons mission to Pluto significant?

• It provided the first detailed images of Pluto.

• It confirmed Pluto's status as a planet.

• It was the first mission to leave the solar system.

• It discovered new moons around Pluto.