Chrysalis class 5 volume 2 lesson 10

1. The voyage to Outer
Space

2. Agriculture
Our ancestors started
agriculture around 12,000
years ago for food. The reasons
influenced the growth of their
crops, affecting their food
supply.
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3. Navigation
Around 2000BCE people started travelling by sea to
discover other lands. they used constellations such as
Big Dipper to help them find directions and navigate at
sea.
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4. Telescopes
⋆ A telescope is an
instrument that is used to
view objects that are very
far away. It is made up of 2
different lenses placed at
two ends of a tube.

5. Ground based Telescopes
Aground based telescopes is
usually housed in a dome
shaped building called
Astronomical observatory.
Examples of Astronomical
Observatory are – Vainu Bappu
observatory, Mauna Kea
observatory and sphinx
observatory
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6. Space Telescopes
⋆ A space telescope or space
observatory is a telescope located in
outer space to observe distant planets,
galaxies and other astronomical objects.
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7. Rocket
⋆ A Rocket is a large, cylinder
shaped vehicle tat is used
for space travel.
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8. An artificial satellite is an
object that people have made
and launched into orbit using
rockets. There are currently
over a thousand
active satellites orbiting the
Earth. The size, altitude and
design of a satellite depend
on its purpose.
Artificial satellites
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9. Space probe
A Space probe is a device sent
into space to collect
information about the different
components of space
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10. Astronaut
a person engaged in or
trained for spaceflight.
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11. spacewalk
⋆ a period of physical activity engaged in by
an astronaut in space outside a spacecraft.
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12. Humans in space
⋆ Ones space probes
successfully landed on
moon, the next step was
for humans to explore
space in person. People
who go into space are
known as astronuts.
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13. Let us learn about
people who have done
space exploration
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14. Nicolaus Copernicus
(1543) First to propose the
idea that the sun was at the
centre of the solar system and
earth and other planets
revolved around the sun in
circular paths
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15. Hans Lippershey
⋆ (1608) The first person
to apply for a patent for
a telescope was Dutch
eyeglass maker Hans
Lippershey
(or Lipperhey).
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16. Galileo Galilei
⋆ (1609) Improved the model
of the telescope and was
first person to use it to
observe it in the sky
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17. Yuri Gagarin
⋆ (1961) First man in space
⋆ His spacecraft comeleted 1
orbit around earth and
landed about two hours
after launching
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18. 18
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