WorksheetsMeasuring Distances in the Universe, Stars and Galaxies
Total questions: 18
Worksheet time: 9mins
Stars are non-luminous celestial bodies. (True/False)
(a)
There is one star which shines very brightly and appears to be stationary in the sky. What are the 3 different names of this Star?
Rohini
Polaris
Polar
Dhruv Tara
Pole Star
Stars are made up of gases, mainly _______ and ________.
Nitrogen, Hydrogen
Hydrogen, Helium
Helium, Nitrogen
Hydrogen, Oxygen
Which are the special units used to measure the distances between heavenly or celestial bodies, like stars and planets?
Astronomical Units
Miles
Kilometres
Light Years
Metres
Stars emit heat and light because of the nuclear reactions taking place inside them. (True/False)
(a)
_____________ is the average distance between the Earth and the Sun. It is denoted by _____.
Miles, 'Mi'
Light Year, 'Ly'
Astronomical unit, 'Au'
Parsec, 'Pc'
A large collection of stars and celestial bodies, such as planets, moons, asteroids and comets, bound together by gravitational attraction, is known as a (a) .
1 au = __________.
1.469 x 108 km
1.496 x 108 km
1.964 x 108 km
1.496 x 107 km
The Pole Star can be observed in the direction of the _______.
North Pole
South Pole
None of these
The average distance between the Sun and Jupiter is _____.
5.2 au
4.3 au
5.2 ly
52 au
Galaxies are classified as _________, _________ or __________ in shape.
Irregular
Circular
Elliptical
Elongated
Spiral
The distance travelled by light in one year is called a (a) .
The Pole Star is used as a reference point to identify ________.
Time
Speed
Direction
Distance
_________ is the second nearest star to the Earth.
Sirius
Pole Star
Alpha Centauri
Arcturus
Our galaxy, the Milky Way galaxy, is also known as :-
(a)
9.461 x 1012 km = _____
1 au
1 pc
1 mi
1 ly
The distance between the Earth and its second nearest star, Alpha Centauri is _____________, which is _____________.
5.2 Astronomical Units
4.3 Light Years
5.2 Light Years
44 trillion km
Why do stars appear to move from east to west?
Due to the rotation of the Earth from east to west.
Due to the revolution of the Earth around the Sun.
Due to the rotation of the Earth's axis.
Due to the rotation of the Earth from west to east.
