Moon
orbits the earth. An object which
orbits a planet is called satellite.
New Moon: When we are in
the “New” Moon phase, the Moon is not visible from our perspective because it
is positioned between the Sun and Earth.
Waxing Crescent moon: when we see
only a sliver of the moon’s surface we call it waxing crescent moon.
Waxing crescent moon shows the start of the
lunar month.
First Quarter Moon: This one confuses a lot of people. In this
case, the term is used because the Moon is in the first quarter of the 30-day cycle,
but it appears half full. The First Quarter and Last Quarter
Moons (both called “half-moons”) happen when the Moon is at a 90 degree
angle with respect to the Earth and Sun. So we are seeing exactly the
half of the moon that gets hit by the Sun’s light.
Waxing
Gibbous moon: it occurs when more than half
of the lit portion of the moon can be seen.
Full
Moon: When the moon’s surface is fully
lighted, it is called as full moon.
Waning
Gibbous Moon: When we can see roughly
three quarter of the moon’s surface.
Last
Quarter Moon: It is phase when half of the
lit portion of the moon is visible after the waning gibbous phase.
Waning Crescent Moon: The Moon is a little sliver of a crescent,
just as in no 2, but the illuminated part is decreasing.
Two terms to memorize:
Waxing = Growing in illumination
Waning = Shrinking in illumination
When the moon passes between the sun and the earth. Then solar eclipse occurs.
When the earth passes between the sun and the moon, then lunar eclipse occurs.
Which of the following is the center of solar
system?
a) Earth
b) Sun
c) Moon
d) Planets
The closest star to Earth is the…………
a) Sirius
b) Rigel
c) Sun
d) Vega
All the planets move around ………………...
a) Moon
b) Sun
c) Satellite
d) Earth
Our solar system consists of sun and… planets. NTS PST 24/11/2019 (11:30)
a) 6
b) 7
c) 8
d) 9
