1st Assessment Task

By: James 6A

Definition of Celestial Objects

Celestial objects :

Pertaining to the sky or visible heaven, or to the universe beyond the earth’s atmosphere, as in celestila body

Characteristics of each celestial objects

Star :

Are seen in the same relative positions year after year

Star are not precisely fixed ; they move at various speed, measured as changes of direction in fractions of a second of arch per year

Asteroids :

Are rocky, metallic bodies that revolve around the Sun.

Has vary in size and composition.

the largest asteroid is ceres which has a diameter of 623 miles ( 1,003 km )

Comets :

The tails of bright comates can be 150 km.

Are called dirty snowball because they are mixtures of ice and dust.

Sun Contains 99.85 % of the mass in the solar system

Is the main sequence star, with a spectral class of G2 meaning that it is somewhat bigger and better than the average star but far smaller than a red giant star.

It’s five billion years old

Rotate faster at it’s equator

Planet Orbit a star

Doesn’t produce energy through nuclear fusion

There are 8 planets

Compose of rock called rocky planets like earth

Made of gaseous material ( Jupiter )

Made of icy bodies

The different between Earth

and other PlanetsEarth :

Is the third planet from the sun

It is formed 4,54 billion years ago

The biggest of all terrestrial planets

The diameter of Earth is 7,926 miles

The circumference measured around the equator is 24, 901 miles

30 % of earth surface covered with land, while 70 % is covered with land.

Mars Is the fourth planet from the Sun

It’s has the biggest mountain in this universe called Olympus Mons ( 3x higher than Mt. Everest )

More than 140 million miles from the Sun.

Smaller than planet Earth

It’s take longer than Earth to takes orbit the Sun it takes : 687 Earth days days to take

Has 2 moons Phobos and Deimos

Jupiter Is a giant planet / largest planet of the solar system

The pull of gravity is much stronger than Earth

Not surrounded by air like Earth

Covered by a thick layer of clouds 11,000 miles deep

Formed into brightly coloured bands – orange, red, white, and tan

The temperature is about 240o below zero fahrenheit

Does not have solid rock surface

Contains hydrogen and helium

The core of Jupiter is solid ; made up iron and rock like planet Earth

Jupiter take 12 times as long as Earth to complete one orbit

Length of day : 9,9 Earth hours

Have 66 moons

Neptune Average distance from the Sun 2, 795,000,000 miles ( 4,498,250,000 km)

Equatorial diameter : 30, 775 miles

Length of day : 16 Earth hours

Average surface temperature : - 353o F ( - 214o C )

Moons : 13

Position from the Sun in orbit : 9th

Uranus Average distance from the Sun : 2, 784, 000, 000 miles

Position from the Sun in orbit : 8th

Equatorial diameter : 31, 760 miles ( 51, 120 km)

Length of day : 17,9 Earth hours

Saturn Average distance from the Sun : 890,800,000 miles

Position from the Sun in orbit : 7th

Equatorial diameter : 74,900 miles

Length of day : 10 hours

Length of year 29,46 Earth years

Average surface temperature : - 218o F ( - 139o C )

Moons : 62 moons

Venus Average distance from the Sun : 67,230,000 miles

Position from the sun : 2nd

Equatorial diameter : 7,520 miles

Length of year : 243 earth days

Length of day : 225 earth days

Average surface : 462o C

Mercury Average distance from the sun :35,980,000 miles

Position from the sun : 1st

Equatorial diameter : 3.030 miles

Length of day : 58 earth days

Length of year : 88 earth days

Moons : 0

Similarities between Earth

and other planetsAll planets orbit a star

There are all in solar system

They have gravity

They have cleared it’s orbital neighborhood

They have core, and ontercore, mantle, lithosphere, crust, orbit around stars, made up matter

The reason why Earth is the best

planet to liveIt has liquid water, not too much to cover the mountains, not so like dry desert as Mars or Venus

The slip sliding movement of the Earth’s crust have created the planet’s towering mountains ranges and plummeting ocean depths

The Earth’s plates tectonics allow for carbon-silicate cycle to operate over geological time scales; keep the surface temperature around the liquid water

Its has right size, not too small, not too big

Earth’s moon stabilized our planet’s rotation, preventing drastic movements of the poles that could cause massive changes in climate

Earth’s moon help the ocean tides

Dwarf PlanetsCeres

1. Position from the Sun in orbit: 5th

2. Length of day: 9.1 Earth hours

3. Length of year: 4.6 Earth year

4. Moons: 0

Pluto 1. Position from the Sun in orbit: 10th2. Length of day: 6.4 Earth Days3. Length of year: 248 Earth year4. Moons: 5

Dwarf PlanetsHaumea

1. Position from the Sun in orbit: 11th

2. Length of day: 4 Earth hours

3. Length of year: 282 Earth year

4. Moons: 2

Makemake

5. Position from the Sun in orbit: 12th

6. Length of day: 22.5 Earth hours

7. Length of year: 305 Earth years

8. Moons: 8

Dwarf PlanetsEris

1. Position from the Sun in orbit: 13th

2. Length of day: 25.9 Earth hours

3. Length of year: 561 Earth years

4. Moons: 1

Bibliographywww.scholastic.com

www.wikipedia.com

National geographic almanac book 2014