Astro: Sun, Moon, Eclipse, Seasons Flashcards
The sun contains how much on the mass of the solar system
99.86%
What are the 3 zones of the sun (from the inside)
Core, radiative zone, convective zone
What are the 3 sun atmospheres (from the outside)
Corona, chromosphere, photosphere
From the core, light and heat pass through the _____
Photosphere
What passes through the photosphere
Heat and light
What is before the radiative zone
The core
What is after the core
Radiative zone
What is after the radiative zone
Convective zone
What is before the convective zone
Radiative zone
The convective zone is
Where light energy (photons) is created
The radiative zone ….
Transports the sun’s energy through radiation
The Penumbra is..?
The outer shadow
The umbra is..?
The inner shadow
What are the 3 types of eclipses
Total, Annular, Partial (TAP)
What’s the longest a solar eclipse can last
7.5 mins
A solar eclipse occurs every..?
18 months
What’s the longest a lunar eclipse can last?
A lunar eclipse can last 3 hours and 45 mins
How much is the earth’s axis tilted
23.5°
If it’s summer in the NH, what is it in the SH?
Winter
If it’s spring in the SH, what about the NH?
Autumn
What’s the season when the north pole starts to move towards the sun
Spring
In summer has the sun risen higher or lower?
Higher
In winter has the sun risen higher or lower?
Lower
How is the NH placed during summer in relation to the sun.
The sun is directly hitting the NH
When it is winter how’s the sun shining?
It’s Indirect sunlight
From full moon how many days until a crescent appears
15 days
How does an eclipse occur/what is it
When a celestial body moves into the shadow of another celestial body
What moon phase needs to be present for a solar eclipse
New moon
What moon phase needs to be present for a lunar eclipse
Full moon
How many lunar eclipses per year
2
Never look directly at the ___
Sun
The moons dark inner shadow is called _____
The Umbra
The moons faint shadow is called _____
The Penumbra
Within the penumbral shadow, you can only see _____ solar eclipse
Partial
In the umbral shadow, you can only see _____ solar eclipse
Total
During solar eclipse, the view can see the outermost layer called the ______
Corona
What colour is the corona
Silver
During lunar eclipse the viewer sees what moon
Blood red moon
Earth experiences seasons because?
Of the tilt of earth on its axis as it orbits the sun
Which of sun’s layers is the hottest
Corona
What Is the chromosphere
Outer layer next to the photosphere. It is red and emits intense solar flares. 4x hotter than the previous also
What is the sun’s transitional zone
The transition region is a very narrow (60 miles / 100 km) layer between the chromosphere and the corona where the temperature rises abruptly from about 8000 to about 500,000 K
You can only view the corona with:
A coronagraph or total solar eclipse
What is an annular solar eclipse
When the moon covers earth but is too far away making it seem smaller and not covering all of the sun from earth
Avg corona temp
1-2 million °C
The sun releases what energy and how
Thermal and radiant energy through nuclear fusion
Does a comet emit or reflect light
Reflect
Does a meteor emit or reflect light
Emits
How many elements are created in the sun
26
Where are all the other elements created
Supernovas
Does a space shuttle emit or reflect light
Both (engine)
Why is the sun so significant
Light and heat, gravity keeps orbits, power generation, photosynthesis
How long for light to reach earth
8 mins
Is the sun a solid mass?
Nope, all gaseous
Natural phonemena attributed to the sun?
Sunspots, solar flare, day & night cycles, weather, seasons, wind, water currents
