Exam (elaborations)
NST1502 ASSIGNMENT 03 DUE 11AUGUST2023
- Course
- NST1502 (NST1502)
- Institution
- University Of South Africa (Unisa)
NST1502 ASSIGNMENT 03 DUE 11AUGUST2023
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,NST ASS 3QUESTION 1
Define the following terms:
1.1 Planet
A planet is a celestial body that orbits around a star, is spherical in shape, and
has cleared its orbit of other debris. In our solar system, there are eight
recognized planets: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and
Neptune. Planets vary in size, composition, and atmospheric conditions. They
play a crucial role in the formation of solar systems and can support life under
certain conditions.
1.2 Oort cloud
The Oort cloud is a hypothetical, vast, and mostly spherical region in space that
is believed to surround the outer edge of our solar system. It is named after Jan
Oort, the Dutch astronomer who proposed its existence in 1950. The Oort cloud
is thought to be composed of icy planetesimals, remnants from the early
formation of the solar system, and is the source of long-period comets. Its exact
boundaries and characteristics are still not fully understood, but it is estimated
to extend from around 2,000 to 200,000 astronomical units (AU) from the Sun.
1.3 Solar system
The term "solar system" refers to a planetary system consisting of a star, known
as the Sun, and all the celestial bodies that are gravitationally bound to it. This
includes planets, moons, asteroids, comets, and other smaller objects. The solar
system we belong to, known as the "Solar System," is located within the Milky
Way galaxy and is home to eight planets, including Earth, as well as numerous
moons, dwarf planets, and other space debris. The Sun is at the center of the
solar system, providing light, heat, and the gravitational force that keeps the
planets and other objects in their orbits.
1.4 Galaxy
, Galaxy refers to the fourth version of the Samsung Galaxy smartphone series.
The term "Galaxy" is commonly used to refer to Samsung's line of smartphones
that run on the Android operating system. Each version, such as 1.4 Galaxy,
represents an update or improvement in the features, specifications, and
overall performance of the device.
1.5 The moon
The term "The moon" refers to Earth's only natural satellite. It is a celestial body
that orbits around the Earth. The moon has a significant impact on Earth's tides
and plays a role in various astronomical phenomena. It has a rocky terrain, no
atmosphere, and is illuminated by reflecting sunlight. The moon goes through
different phases, such as full moon, new moon, waxing, and waning, due to its
position relative to the Earth and the Sun. It has been the subject of scientific
exploration and study, including manned and unmanned missions by space
agencies.
1.6 Atmosphere
Atmosphere refers to the pressure exerted by a column of air that extends
upwards to a height of 1.6 times the average height of the Earth's atmosphere
at sea level. It is a unit of pressure commonly used in meteorology and is
equivalent to approximately 1.6 times the atmospheric pressure at sea level,
which is about 160 kilopascals or 1.58 kilograms per square centimeter.
1.7 Earth
Earth refers to a hypothetical planet or celestial body that is 1.7 times the size
or mass of Earth. It is a comparative measurement used to understand the
relative size or mass of another planet or object when compared to Earth. For
example, if a planet is described as "1.7 Earths," it means that it is
approximately 1.7 times larger or more
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