1. 6.exploring space 2 3 ancient people did not have tools to look at the stars and the planets....
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6. Exploring Space
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Ancient people did not have tools to look at the stars and
the planets.
What they learned was based on what they saw with their
eyes.
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Today, people have many tools to study space, like the
telescopeVocabulary:
telescope
A tool that makes distant objects look larger
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Telescopes help people learn about the stars and the planets
With a special kind of telescope, a scientist can learn how far away a star is and what
the star is made of
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Video on Telescopes
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Satellites also help us explore space
Vocabulary:
satellite
An object in space that orbits another object in space
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Satellites made by people send pictures and other information
back to Earth
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The Hubble TelescopeOrbits Earth
It sends us pictures of stars 100 times clearer than we get
from instruments on Earth
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1889 – 1953 Born in Marshfield, Missouri
Hubble has helped change our thoughts and perception of the
universe in two important ways.
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First, Hubble confirmed the existence of other galaxies other
than the Milky Way,
during a time when many people thought the Milky Way was the
entire universe.
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Secondly, with the help of other astronomers,
he confirmed that the universe was expanding at a constant rate by
developing a mathematical concept to back up this statement, now
known as Hubble's Law.
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Another way people explore space is to send astronauts in
spacecraftVocabulary
spacecraft
A vehicle that can travel in space
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Astronauts have been to the moon several times
The first landing on the moon took place on July 20, 1969
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Neil Armstrong was the first person to walk on the moon
He and other astronauts took many photographs and collected rocks and soil
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Video About Apollo 11
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They left instruments on the moon to gather information
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Astronauts have not traveled to other planets
But some spacecraft have traveled far into space.
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The Voyager space probes were sent into space in 1977 to study the most distant planets
Voyager took pictures of Jupiter, Saturn, Uranus, and
Neptune
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These pictures showed moons that people have never seen
before
They showed volcanoes, too
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Voyager is now traveling beyond our solar system
And has identified other solar systems beyond ours
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Video Voyager by NASA