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The Solar System is the gravitationally bound system of the Sun and the objects that orbit it, either directly or indirectly. Of the objects that orbit the Sun directly, the largest are the eight planets, with the remainder being smaller objects, the dwarf planets, and small Solar System bodies.
Mars is a cold, desert-like place covered in dust. This dust is made of iron oxides, giving the planet its iconic red hue.
Mars shares similarities with Earth: It is rocky, has mountains, valleys and canyons, and storm systems ranging from localized tornado-like dust devils to planet-engulfing dust storms.
Mars has two small moons.
Name these moons.
Clima tropical
Surgimento da civilização humana
A planet's day is the time it takes the planet to rotate or spin once on its axis.
Write down Mars's day measured in Earth days.
Expansão do oceano
Aparecimento do Homo Sapiens
Plantas modernas
Diversificação de formas de vida na fauna e flora
Primeiros primatas
Expansão das aves
Earth is a water world, with two-thirds of the planet covered by oceans.
It's the only world known to harbor life.
Earth's atmosphere is rich in nitrogen and oxygen.
Its name originates from 'Die Erde,' the German word for 'the ground.'
Earth may once have had two moons, nowadays it has just one.
A planet's day is the time it takes the planet to rotate or spin once on its axis.
Write down the Earth's day in hours.
A terra se encontra coberta com árvores e flores
Surgimento dos primeiros mamíferos
Clima árido e quente
Venus is Earth's twin in size and has no moons.
Its surface has various mountains and volcanoes. Because of its thick, toxic atmosphere that's made of sulfuric acid clouds, Venus is an extreme example of the greenhouse effect. The average temperature on Venus' surface is 900 F (465 C).
Venus spins slowly from east to west, the opposite direction to most of the other planets.
The Greeks believed Venus was two different objects — one in the morning sky and another in the evening. Because it is often brighter than any other object in the sky, Venus has generated many UFO reports.
A planet's day is the time it takes the planet to rotate or spin once on its axis.
Write down Venus's day measured in Earth days.
Aparecimento de insetos
Anfíbios
Répteis
Diversificação da vida
Surgem animais com partes minerais
Mercury is the smallest, only a little bit larger than Earth's moon. Mercury has no moon.
It experiences dramatic changes in its day and night temperatures: Day temperatures can reach a scorching 840 F (450 C), which is hot enough to melt lead. Meanwhile, on the night side, temperatures drop to minus 290 F (minus 180 C).
It also has a very thin atmosphere of oxygen, sodium, hydrogen, helium, and potassium and can't break-up incoming meteors, so its surface is pockmarked with craters, just like the moon.
Proliferação dos seres fotossintetizantes
How long does it take for Mercury to go around the sun?
Algas coloniais e invertebrados de corpo mole
A planet's day is the time it takes the planet to rotate or spin once on its axis.
Write down Mercury's day measured in Earth days.
Organismos unicelulares
Our Solar System has eight “official” planets which orbit the Sun.
Each planet is at a different distance from the sun. Name its position.
Aumento da liberação de gás oxigênio para a atmosfera
