The Great Enigma: Where Are We Really in the Universe ? | Space Documentary

🌍 Where does the human being stand in the midst of this cosmic immensity?
Man is one of millions of living species on planet Earth. Throughout our evolution, we have distinguished ourselves by our ability to modify the environment and shape nature to suit our needs. It has developed complex societies and diverse cultures that reflect its way of living and interacting. His place on Earth is unique and considered dominant.

Man is a product of biological evolution, having developed on one planet among millions of others, in one galaxy among billions of others, within a constantly expanding Universe. Seen in this light, Man becomes a relatively insignificant being in the immensity of the Universe. However, we have had the ability and intelligence to make sense of the cosmos and seek to understand its mysteries.
Thanks to scientific research, our knowledge of our planet has grown. The Earth belongs to the solar system. This solar system is part of a galaxy called the Milky Way, which in turn is part of a superstructure called the Local Group. The Local Group is just a small part of a supercluster of galaxies called Laniakea. And all this little world is concentrated in a Universe with immeasurable boundaries. To put it another way, if we were to scale up the Universe to the size of our planet, Laniakea would be a continent, the Local Group our country, the Milky Way our region, the solar system our city and Earth our home. Man's power then becomes very relative...




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💥 Where Are We Really in the Universe? :
- Planet Earth was formed within the solar system. This solar system is a precious territory, over 4 billion years old, and includes the Sun, the eight known planets and numerous small bodies of rock and ice called asteroids and comets.

The solar system is divided into several zones. The inner zone is made up of the so-called telluric planets: Mercury, Venus, Mars and, of course, the Earth. These four planets are rocky and metallic. Their size is relatively small. During their formation, the sun's heat expelled gases from this zone, concentrating dense elements.
Beyond Mars lies a belt of asteroids. These are millions of lumps of rock, the waste products of planet formation.
From this asteroid belt, we enter the realm of the giant planets: Jupiter, Saturn, Uranus and Neptune. In this outer zone of the solar system, the lower temperatures during the formation of our solar system enabled the existence of volatile elements. The planets are larger than those of the terrestrial planets, and made up of light elements such as hydrogen and helium.

The formation of the solar system took place after a nebula gradually collapsed in on itself following the explosion of a supernova. The primitive nebula flattened as it rotated. The central part heated up, forming a protosun. Dust rich in carbon, ice, metals and minerals clumped together. This phenomenon is known as accretion. These blocks came together to form protoplanets and, a few million years later, the planets of today's size.

Laniakea is made up of three superclusters: the Virgo supercluster, of which we are a part, the Hydra-Centaur supercluster, in which the Great Attractor is located, and finally the Indian Peacock supercluster. As in most galactic clusters, the space between the individual galaxies is not exactly empty.
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🎬 Today's program:
00:00 - Introduction
02:35 - Earth's place in the solar system
04:58 - The Earth
08:47 - The Moon
10:33 - The Sun
13:17 - Mercury
14:34 - Venus
15:42 - Mars
18:10 - Asteroid belt
20:43 - Jupiter
22:43 - Saturn
24:57 - Uranus
27:50 - Neptune
29:48 - Pluto
31:07 - The solar system beyond Pluto (Kuiper belt & Oort cloud)
36:44 - The solar system's place in the Milky Way galaxy
37:27 - The galaxies
40:24 - Our Galaxy, the Milky Way
41:43 - Composition of the Milky Way galaxy
42:21 - The stars
47:49 - Constellations
49:28 - Star Clusters
51:11 - Interstellar Clouds
52:54 - Description of the Milky Way
58:18 - The Milky Way's place in the Local Group
01:05:02 - The local group's place in Laniakea
01:07:26 - Laniakea's place in the observable Universe
01:12:01 - What is our place beyond the observable Universe?


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