Astronomy Flashcard

Front

What is a Gibbous Moon?

Back

A Gibbous Moon is a phase of the Moon when more than half of its surface is illuminated by the Sun, but it is not yet full.

Front

What are the two parts of a shadow?

Back

The two parts of a shadow are the Umbra, which is the darker part, and the Penumbra, which is the lighter part.

Front

What did Ptolemy and Copernicus agree on regarding orbits?

Back

They both agreed that all orbits must be perfect circles.

Front

Which planet is the densest in the solar system?

Back

Earth is the densest planet in the solar system.

Front

What is the Europa Clipper mission?

Back

The Europa Clipper mission is a NASA mission designed to study the conditions on Europa, one of Jupiter's moons.

Front

Define Umbra in the context of shadows.

Back

Umbra is the darkest part of a shadow where the light source is completely blocked.

Front

What is the Penumbra?

Back

The Penumbra is the lighter part of a shadow where the light source is partially blocked.

Front

What is the significance of the Gibbous Moon phase?

Back

The Gibbous Moon phase indicates that the Moon is nearing its full phase, which can affect tides and nocturnal visibility.

Front

What is the main difference between the geocentric and heliocentric models?

Back

The geocentric model places the Earth at the center of the universe, while the heliocentric model places the Sun at the center.

Front

What is the primary focus of the Europa Clipper mission?

Back

The primary focus of the Europa Clipper mission is to investigate the potential habitability of Europa and its subsurface ocean.