Solar Systems Flashcards
1
Q
SUN?
A
- Closest star in our solar system.
- 4.5 bn old
- Will die after (scientist predicted)
2
Q
Proxima Centauri?
A
Closest star to the earth after sun, 40 trillion Km away.
3
Q
Structure of Sun?
A
- The Core
- The Photosphere
- The Cromosphere
- The Corona
- Solar Wind
- Sun Spots
4
Q
The core of sun?
A
- Has high temperature and pressure.
- Temp is 15 mn Centigrade
- convert Hydrogen nuclei in to helium nucleus
- a lot amount of energy released.
5
Q
The photosphere of the sun?
A
- Lower atmosphere
- 300 miles (500 km Thick)
- temp is 5500 centigrade
- between chromospeher and central core
6
Q
The Chromospehere of Sun?
A
- Reddish lager outside the photosphere
- temp is from 6000 to 50,000 centigrade
- Visible duirng solar eclipse when the moon block the photosphere.
7
Q
The corona of sun?
A
- outer layer of Sun atmosphere
* temp reaches 1 million centigrade.
8
Q
The Solar Winds?
A
- Stream of charged particle that flow out from sun.
- as the sun rotates the solar wind blows in a Pinwheeled Pattern through the solar system.
- take 5 days to reach earth
- has a velocity of 800 Km/sec
- causes aurora and develop tail of comet.
9
Q
Sunspots?
A
- are cool and dark patches on sun,
- caused by disturbance in magnetic field
- large sunspots can be wider than earth.
10
Q
Feature Of Sun?
A
- Mass is 1.989x10^30 Kg, 330,000 times of earth.
- composed of 74% of H2, 24% He & 2% heavy metals.
- surface temp 5500 degree.
- Core temp is 150mn centigrade.
- distance from earth is 150mn Km or 93mn miles.
- Has large magnetic feild.
- in 8min 20 sec it rays reached.
11
Q
Planets?
A
- term used for a body who orbit around sun.
- Greek word plantes = Wanderer
- has eight planet
- pluto is a dwarf planet.
- 332 planets exists in other solar system called exoplanets.
12
Q
Inner Planets?
A
M
13
Q
Solar System?
A
- consist of sun, planets, Dwarf planets, moons, an asteroid belt, comets, meteors and other object.
- Sun is the biggest object of it and contain more than 99% mass of it.
- 4.5 bn old
