Day 02- Formation of our Solar...
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Day 02 Formation of our Solar System 1 May 29, 2014 The Formation of Our Solar System The Solar Nebula Theory Scientific calculations suggest that our Sun is 5 billion years old and the orbiting planets are ~ 4.6 billion years old . The solar nebula theory suggests that our Sun and our solar system formed from the collapse of a cloud of dust and gas. the cloud was slowly rotating, so centrifugal force made it into a disk transferring matter into the centre the concentration of angular momentum made it rotate more quickly During the formation of our solar system, the smallest planets (closest to the Sun) were blasted with radiation. Due to the lack of gravity, they were unable to hold onto their hot atmospheres, so they became rocky inner planets, which are now known as _______________, ______________, _______________ and ________________. The outer planets were able to retain their gas, due to their distance from the Sun’s intense heat. These became the gas giants of our solar system which are now known as _______________, _______________, _______________ and __________________. Diagram of Formation of Solar System Solar Nebula Theory My very educated mother just served us noodles Mercury Venus Earth Mars Saturn Uranus Jupiter Neptune
Transcript of Day 02- Formation of our Solar...
Day 02 Formation of our Solar System
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May 29, 2014
The Formation of Our Solar System
The Solar Nebula Theory
Scientific calculations suggest that our Sun is 5 billion years old and the orbiting planets are ~ 4.6 billion years old.
The solar nebula theory suggests that our Sun and our solar system formed from the collapse of a cloud of dust and gas.
the cloud was slowly rotating, so centrifugal force made it into a disk transferring matter into the centre
the concentration of angular momentum made it rotate more quickly
During the formation of our solar system, the smallest planets (closest to the Sun) were blasted with radiation. Due to the lack of gravity, they were unable to hold onto their hot atmospheres, so they became rocky inner planets, which are now known as _______________, ______________, _______________ and ________________.
The outer planets were able to retain their gas, due to their distance from the Sun’s intense heat. These became the gas giants of our solar system which are now known as _______________, _______________, _______________and __________________.
Diagram of Formation of Solar System Solar Nebula Theory
My very educated mother just served us noodles.
Mercury Venus Earth Mars
Saturn UranusJupiterNeptune
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Distances Between the Planets
Large distances keep the planets well separated from each other. In fact, the planets lie so far apart that kilometres are not a meaningful way to measure the distances between them. For this reason, astronomers created a unit for measuring distances in the solar system: the astronomical unit (AU). The AU is equal to the average distance between Earth and the Sun about 150 million kilometers.
The International Astronomical Union's definition of a planet:As of August 2006, the IAU decided to define a planet as an object that exhibits the following three traits:
1. it must orbit the Sun
2. it must be massive enough that its own gravity pulls it into a nearly round shape
3. it must be dominant enough to have cleared away other objects within its neighbourhood
It was at this time that Pluto lost its planetary status and became known as a dwarf planet.
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Planet DatabaseUsing pages 448451 in your textbook or these links, complete the following table.
Table 1 Comparing the Properties of the Terrestrial Planets
Mercury Venus Earth Mars
Size (Earth diameters)Distance from Sun (AU)Mass (Earthmasses)
Density (Earth densities)
Avg. Surface Temperature (۫C)
Rotation Period (days)
Orbital Period (years)
Number of moons
Description of Atmosphere (if present)
Significant Features
http://p1cdn1static.sharpschool.com/UserFiles/Servers/Server_9253295/File/Parent%20Learning%20Calendars/Science%20Resources/PlanetFactSheet.pdfhttp://theanswermachine.tripod.com/id2.html
http://nssdc.gsfc.nasa.gov/planetary/factsheet/planet_table_ratio.html
Day 02 Formation of our Solar System
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May 29, 2014
Table 2 Comparing the properties of the outer planets
Jupiter Saturn Uranus Neptune
Size (Earth diameters)
Distance (AU)
Mass (Earthmasses)
Density (Earth densities)
Avg. Surface Temperature (۫C)
Rotation Period (days)
Orbital Period (years)
Number of moons
Description of Atmosphere (if present)
Significant Features
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