Solar system

Monographic: Earth in the Universe

Monographic: Earth in the Universe

Let us remember for a moment the words that astronaut Neil Armstrong exclaimed at the time of the moon landing: "I am looking at the Earth from here. It is large, bright and beautiful."

Since that time, there have been many people who have dreamed of being able to contemplate that image with their own eyes. Once the human being left aboard space rockets, our planet was the first to be observed from space. And it was an overwhelming vision.

As seen in the image, seen from space, the Earth is a beautiful and bright blue sphere with white spots that correspond to the clouds, while the brown areas are the continents. It seems to radiate light and indeed it is so since, like the terrestrial satellite we call Luna, our planet also reflects sunlight.

The second image is a montage of several photos taken by NASA in which the exit of the Earth from the Moon is appreciated, similar to how we from our planet contemplate the sunrise.

In this chapter we will try to analyze our planet as if we were approaching it on board an imaginary ship, from the depths of the Universe. We will see how it is observed from space, fundamentally how our planet looks from the lunar surface.

We will analyze what we can know about the Earth. We will get to know its mass, its approximate shape, the reason for the strange northern lights and other features of our planet ... So without further ado, the journey begins. Can you come with us?

Approach to planet Earth

In this chapter:

The Solar System and our Galaxy: Due to the infinity of the Universe, astronomers use the astronomical unit as a basic measure (U ... Read pageA shared extraterrestrial past: It is estimated that the Earth was formed by agglomeration of matter attracted to each other by action ... Read pageWhat is special about our Planet ?: Our planet is very peculiar in many ways.It has a concentric structure ... Read pageThe Earth's atmosphere: The Earth has an oxygen-rich atmosphere, moderate temperatures, abundant water and a composition ... Read pageLas Windows to the Universe: Due to the existence of the atmosphere, practically almost all the elements of space are repelled or… Read page Form and dimensions of the planet: Our planet, the Earth, has a spherical shape, flattened towards the poles, called geoid… Read pageAre there other lands in the Universe ?: Something that humanity has been asking along the different times is if our ... Read pageThe Kepler telescope: The Kepler space telescope is one of the essential instruments for the knowledge of the universe more or ... Read page Are we alone in the Universe ?: As the human being advances in his knowledge of the Universe, it is verified that every time… Read page NASA and Riotinto in Huelva: You don't have to go to outer space to find life forms that could exist in other worlds… Read page