“You are Galileo!” Project

Let’s Observe the Moon! (for 25x, 50x)Observation and Sketch
Name
In 1906, the Italian Scientist Galileo Galilei became thefirst person to make an astronomical observation using atelescope. He made a great discovery when he wasobserving the Moon. What was his great discovery? Let’s
use our telescope and experience his great discovery!

Address
Age

Let’s Observe and draw a sketch of the Moon. If possible, draw a couple of sketches on different days.
At ﬁrst, use the eyepiece of 25x. Then next, use the eyepiece of 50x for detailed observation of a part of moon's surface (craters, mare and so on).

Example

Date

18:30

Month 11 Day 20

weather: clear

Site

Mitaka-shi, Osawa, Japan

Aperture of Telescope

5cm

Magnification*

25x*Magnification of a telescope can be calculated by dividing the focal length of the eye piece with the focal length of the telescope.

Draw a sketch of the whole moon.

ExampleMake a detailed
sketch of what you

Day 1weather:

Date
Site:

MonthDay

Aperture of Telescopecm

Magnificationx© “You are Galileo!” ProjectObservation and Sketch

Day 2
weather:Day 3
weather:

DateLetʼs Observe the Moon!（for 25×,50×）:MonthDay

SiteDateSite:

MonthDay

Aperture of Telescopecm

Magnificationx

Aperture of Telescopecm

Magnificationx

Write down What you have noticed through Observation and Sketch, and anything peculiar you foundY

“You are Galileo” Project4

Let’s Observe the Moon!

'% 6Ŭ7#Ŭ;1 4')#'1 21,.
.+

Post Observation Study
Name

From your own observation and Galileo’sobservations, you can see that the surface of theMoon is uneven and rough and that the apparent
shape of the Moon changes on different days.

$FRS\RI*DOLOHR¶VVNHWFKHVRIWKH0RRQĺŶ1Rw, let’s look at the map and find the place you decided to make a detailed sketch of. What kind ofname does it have?
*You can download a map of the Moon from the “You are Galileo!” web site. Also, there is a map ofthe Moon in the guidebook attached to the telescopes by Hoshi no Techo, Inc.
*The map shows around the time of full moon. When you watch the moon in the evening, the left
VLGHRIWKHPDS (DVWVLGHRIWKH0RRQ LVEULJKW:KHQ\RXZDWFKWKHPRRQDWGDZQWKHULJKWVLGH
RIWKHPDS :HVWRIWKH0RRQ LVEULJKW<RXFDQVHHDQLQYHUWHGLPDJHLQWKHILHOGRIYLHZRIWKH
telescope.
Ŷ7KHUHDUHFUDWHUVPDULDDQGPRXQWDLQUDQJHVRQWhe Moon. Did you find them in your observationand sketches? Mark the ones you’ve noticed.
Ƒ&UDWHUV'HQWVRQWKHVXUIDFHRIWKH0RRQ0RVWDUHURXQG
Ƒ0DULD VHDV ODFXV ODNH VLQXV ED\ 6HFWLRQVWKat look dark on the Moon. Though they are called
the sea, they are covered with rocks and have no water. They
don’t have many craters and are flat.
Ƒ0RXQWDLQUDQJH6HFWLRQVZHUHPRXQWDLQIRUPDline just like mountain ranges on Earth.

© “You are Galileo!” Project³<RXDUH*DOLOHR´3URMHFW/HW¶V2EVHUYHWKH0RRQ

3RVW2EVHUYDWLRQ6WXG\1H[W OHW¶V FRQVLGHU ZK\ the SKDVHV of the PRRQ FKDQJHV 7KLVLV EHFDXVH the UHODWLYH SRVLWLRQV of the 0RRQ 6XQ DQG EarthFKDQJHV The Moon URWDWHV DURXQG the Earth OLNH the ILJXUHEHORZ'UDZKRZWKH0RRQORRNVOLNHIURPWKH(DUWK/LJKWIURPWKH6XQ:KHQ\RXORRNDWWKH
0RRQWKURXJKWKH
WHOHVFRSHLWDSHDUVIOLSSHGOLNHWKLVOrbit of the MoonMoonEarthĺ<RXFDQVHHWKDWWKHVKDSHFKDQJHVOLNHWKH\GRLQ\RXUVNHWFKHVŶ/HW¶VZULWHGRZQZKDW\RXOHDUQHGZLWKWKLVREVHUYDWLoQDQGZKDW\RXZDQWWROHDUQPRUHDERXW'LG\RXH[SHULHQFH*DOLOHR¶V'LVFRYHU\"
³<RXDUH*DOLOHR´3URMHFW

★Post Observation Study−Memo−
About 400 years ago, the telescope which Galileo Galilei made and usedto hisobservations had a very narrow field of view.That situation can be experienced with thisassembly telescope.By comparing the field of views of the 25x, 50x eyepieces with that
ofthe Galileo's eyepiece, you notice that the field of view of theGalileo's telescope wasreally narrow. And you will notice that theimage becomes erect from the inverted
image.In this respect, the Galileo's telescope is suitable for observationsof groundscenery.It would be nice to compare the scenery through the 25x, 50x eyepieceswith thatof the Galileo's eyepiece in a daytime.Although you may easily imagine difficulties ofGalileo Galilei whocontinued observing celestial objects through the narrow field ofview,the telescope could be a miracle tool for observations ofcelestial objects, compared withnaked eye.