studying for science test Flashcards
(60 cards)
In what year did astronomers hypothesize why the moon and planets are shone
500 BCE
did they have telescopes in 500 BCE
No
what is the largest and brightest object in the night sky
the Moon
the moon is only earth’s natural what
satellite
what is a satlelite
something that orbits earth
what is a star
a gaint ball of gas or plasma that is made out of hydrogen and helium
Does the position is stars relative to each other change from out prespective
yes but it takes a long time to change a little bit
What are some characteristics of a planet
Orbits a star (in our case, the Sun).
Has enough gravity to pull itself into a nearly round shape.
Has cleared its orbit of other debris
how many planets are there in our solar system
8
what is a Meteoroid
the object while it is still in spacea
what is a Meteor
a shooting star kinda thing
what is a meteorite
a part of the meteor that enters earths atmosphere
what is a comet
icy object that orbits the Sun and is made of dust, rock, and frozen gases.
how does the tail of a comet form
ice to vaporize and release gas and dust—this forms a glowing cloud around the nucleus called the coma.
How often does Halleys comet reappear
75 years
what year will Halley comet come
2061
how many constelltions is the sky divied into
88
what do the position of the objects in the sky depend on
the rotation of earth
what direction do the stars move throughout the night
east to west
During what season is Orin more visible to us
winter
what causes seasonal changes
earths titlt and orbit
what side to the star slight shift to
left
what is the narrow band that the planets move on called
ecliptic
why can Mars, Jupiter, and Saturn by visible all night long
because of the opposition of these planets