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Because they have been observed with the naked eye, optical telescopes, radio telescopes and neutrino detectors.
Look at a piece of gold, and you are looking at the result of a supernova explosion.
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∙ 14y ago
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What is planet is 15 more time massive than earth?
None of the planets that scientist know is exactly 15 times more massive than earth, but the closet one is Saturn, it is 18 times more bigger than earth,
Is Juan lozeno a famous his scientist?
No he's a football player well at least Juan LozAno is. Maybe Juan Lozeno is a faous scientist who i don't know?
Scientist know that the moon does not have a magnetic fieldthis probably means that the moon does not have?
movement in its core.
What was Albert Einsteins Dream?
hes dream was to make his home town know for a great scientist he was hopeing it well be him
How did scientist know about the information of features of the moon?
Nasa has many digital satellites set up viewing the moon.
How scientist know that dinosaurs existed?
Because they are alive today, birds are dinosaurs. And because of fossils.
What year were the first slaves captured and how?
Slavery has existed since prehistoric times. We don't know exactly when or where it started.
Chile's government existed when?
Chile's government has existed since 1810. - I suspect you wanted different information, so you should re-write your question asking exactly what you want to know.
Will earth be in existence when the sun explods?
Scientist or people know when the sun exactly will explode the question is will the earth and some planets go with it?
Why is it important for scientist to keep accurate records of their experiments?
If scientists are to be able to draw meaningful conclusions from their experiments, they must have accurate records. If you do not know exactly what happened, you will not be able to figure out exactly what it means.
Give 5 instruments scientist use in their study?
Study of... without knowing what the scientists are studying, you cannot know exactly what instruments they are using.
How do you know Cleopatra existed?
We know Cleopatra existed because of the written evidence from the ancient writers.
How was the scientific revolution an extension of the Renaissance?
The scientific revolution was filled with scientist who wanted to know how exactly this world was. They wanted to know if god was real or not. In the Renaissance of course they based everything on Religion not much science. As the scientist in the revolution still believed in god they just had some proven theories.
What is wrong at the Bermuda triangle?
Scientist haven't exactly found out but, this is what they know so far, mostly weather has to do with this and other things but this is all the information i can give. BYE!!!
Are there chanes that life exists orexisted at one time on Pluto?
Because of pluto's severe lack of sunlight, oxygen and heat, none of the life that we know could have possibly existed on pluto. Is it possible another form of life existed on Pluto? Sure its possible. Scientist havent found traces of life.
Why can't we say exactly how many species there are?
Because new species form every single day which adds more to what scientists know. By the way, Did you know there are hundreds of species of animals out there that scientist have not yet discovered.
Foreign scientist and their biography?
As we do not know where you are from and this is an international site, we cannot know who would be a foreign scientist to you.
