lecture 2 Flashcards
(12 cards)
What causes the phases of the moon?
The phases of the moon are caused by its orbit around the Earth, which changes the portion of the illuminated side we can see. The moon’s phases range from new moon to full moon.
When is a crescent moon visible?
A crescent moon is visible close to the horizon at sunrise or sunset.
When is a full moon visible?
A full moon rises as the sun sets and is high in the sky at midnight.
Why do we only see one face of the moon from Earth?
We only see one face of the moon because it rotates on its axis at the same speed it orbits the Earth, a phenomenon called synchronous rotation.
What is a solar eclipse?
A solar eclipse occurs when the moon passes between the Earth and the sun, blocking out the sun’s light.
What is a lunar eclipse?
A lunar eclipse happens when the Earth casts a shadow on the moon, blocking sunlight and causing the moon to appear dimmed or reddish.
How long do solar eclipses last?
Solar eclipses last at most 8 minutes and are only visible from specific locations on Earth.
How long do lunar eclipses last?
Lunar eclipses last for several hours and are visible to everyone on Earth who can see the moon.
What is a constellation?
A constellation is a pattern of stars in the sky that forms a recognisable shape, often used historically for storytelling, navigation, and marking time.
Why are constellations significant?
Constellations are used by astronomers to specify locations of stars and celestial objects. They also hold cultural significance, with many stars named and grouped into patterns across different cultures.
What is the Matariki cluster and its significance?
The Matariki cluster, also known as the Pleiades, is a group of stars used in Māori culture to mark the beginning of the new year. Its “first helical” rising in the dawn sky signifies the Matariki holiday.
