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Destination L'Espace

French science test review on space

Porquoi c'est tres difficile pour un humain de survivre dans l'espace? sans air, sans eau, sans nourriture, tres froid, tres chaud, beaucoup de radiations et la gravite varie beaucoup
Le Big Bang c'est la theorie sur la formation de l'Univers
Quelle age et l'Univers? 13,7 milliards d'annees (13.7 billion years)
une unite astronomique (1 UA) C'est la distance entre la Terre et le Soleil (150 milliards km)
une annee-lumiere (1 a.l.) 9,460 milliards de km
light speed 300,000 km/sec
une planete est un corps celeste en forme de sphere et qui tourne autour d'une etoile
une lune ou satellite naturel, est un sorps celeste qui tourne autour d'une planete
rotation quand un objet fait un tour sur lui-meme (when an object turns about itself)
la rotation de la terre 24 heures (1 day)
revolution une orbit complete autour d'un autre objet (one orbit completely around another object)
la revolution de la terre autour la soleil un annee (365,25 jours)
notre galaxie la Voie lactee (the Milky way)
notre galaxie contient environ 200 000 millions d'etoiles avec un diametre a 80 000 annees-lumiere
L'etoile la plus proche de nous se trouve (how far away is the nearest star) 4,3 a.l. (called proxima centauri) (it would take us 19 000 years to reach it)
La galaxie la plus proche de nous Andromede 2,55 millions a.l. (it would take us 11 million years to reach it)
le systeme solaire est un groupe de corps celestes en orbite autour d'une etoile
dans le notre systeme solaire le soleil, 8 planetes, 5 planetes naines (dwarf), 60 lunes, milliers d'asteroides, de meteoroides et de cometes
gravite une force qui attire les objects les uns vers les autres (a force that attracts all objects to each other)
gravite est influncee par (gravity is affected by) la masse des objects (the mass of the objects)
Quelle ne change pas avec les gravite - poids ou masse masse never changes because of gravity...but your weight does. You weigh more on Jupiter but your mass is the same.
centrifugal force keeps the earth from being pulled into the sun by the sun's gravity.
meteoroides un morceau de roche (piece of rock)0-10m qui flotte dans l'espace
meteore etoile filante (falling star) - un meteoroide qui brule en tonbant dans l'atmosphere
meteorite un meteore qui frappe la Terre
un asteroide est un grand meteoroide
les cometes sont faites de glace et de poussiere (made of ice and dust)
cometes a deux types d'orbites une orbite courte (200 years or less from the Kuiper belt) et une orbite longue (30 million years from the d'Oort cloud)
the perseid meteor shower (every summer between 9-13 August) happens because Earth traverse de la orbite de la comete Swift-Tuttle
l'equinoxe du printemps 21 mars - length of night and day the same
le solstice d'ete 21 juin - day is longer than night
l'equinoxe d'automne 21 septembre - length of night and day the same
le solstice d'hiver 21 decembre - night is longer than day
les eclipses solaire when the new moon comes between the sun and the earth, blocking the sun's light. Rare - does not happen often.
les eclipse lunaires la Terre est placee entre la lune et le soleil - the earth is between the sun and moon - the moon is blocked from the sun's light - the moon appears red.
Ou est l'etoile formee? dans les nebuleuses
nebuleuses des grand nuages de gaz (giant gas and dust cloud in space)
fusion nucleaire (nuclear fusion)- the heart of a star happens when a large quantity of hydrogen gathers together in a nebula - the gravity increases and the pressure and heat force the hydrogen atoms to combine into helium atoms
fusion nucleaire produces the heat (chaleur), light (lumiere) and the radiation of the sun
le soleil our sun is a yellow, medium star 1.4 million kms around
sun facts 4.6 milliards d'annees compose d'hydrogen et helium
sun surface temperature 6000 degrees celsius
sun core (center) temperature 15 million degrees celsius
constellation est un groupe d'etoiles that forms an image
zodiaque a group of 12 constellations (used by crazy people to tell the future)
Created by: devon science