US astronomer discovers new Neptune moon

The transcript discusses the discovery of Neptune's 14th known moon, S 2004 N1, located nearly 4.5 billion kilometers from the sun. This moon, the smallest in the Neptunian system with a diameter of only 20 kilometers, was identified through tracking archival data using the Hubble Space Telescope. The discovery highlights the capabilities of modern astronomical tools in identifying celestial bodies.

How far is Neptune's newly discovered moon from the sun?

• 5.5 billion kilometers

• 4.5 billion kilometers

• 6.5 billion kilometers

• 3.5 billion kilometers

What is the designation given to Neptune's 14th known moon?

• S 2007 N1

• S 2005 N1

• S 2004 N1

• S 2006 N1

What method did the astronomer use to discover the new moon's orbit?

• Mathematical modeling

• Direct observation

• Archival tracking

• Computer simulation

What is the diameter of Neptune's smallest moon?

• 15 kilometers

• 25 kilometers

• 10 kilometers

• 20 kilometers

Which telescope was used to observe Neptune's smallest moon?

• Spitzer Space Telescope

• Hubble Space Telescope

• Chandra X-ray Observatory

• James Webb Space Telescope