Astronomy-Objective Related Question Answers
26. Milkyway belongs to a cluster of some 24 galaxies called?
Local group
27. Energy is transferred from the Sun to Earth mainly by?
electromagnetic waves
28. The best evidence that Earth spins on its axis is provided by?
apparent shifts in the swing of a Foucault pendulum
29. Existence of galaxies beyond milky way was first demonstrated by?
Edwin Hubble
30. Galaxies are also called?
island of universe
31. Father of Indian Astronomy?
Aryabhata
32. The system of astronomy based on Heliocentre (sun centred) universe was presented by?
Copernicus
33. The astronomer who presented the system of astronomy based on a geo centric (earth centred) universe?
Ptolemy
34. The first who attempted to measure stellar distances?
James Gregory
35. The length of an Earth day is determined by the time required for approximately one?
Earth rotation
36. The apparent rising and setting of the Sun, as viewed from Earth, is caused by?
Earth’s rotation
37. The apparent daily path of the Sun changes with the seasons because?
Earth's axis is tilted
38. An inter stellar cloud of dust, hydrogen, helium and other ionized gases are called?
Pulsars
39. First pulsar was discovered by?
Jacelyn Bell
40. The pieces of rocks, which move around the sun are called?
Meteoroids
41. The tilt of the Earth on its axis is a cause of the Earth’s?
changing length of day and night
42. Compared to the distances between the planets of our solar system, the distances between stars are usually?
much greater
43. Why does the moon appear to move across the sky during the night?
Earth rotates on its axis.
44. What time of year is the sun farthest from the earth?
Summer in the Northern Hemisphere.
45. As per Microwave Anisotropy Probe (MAP) what is the exact age of the universe?
13.7 billion year after the theoretical Big Bang
46. Name the British astronomer who, told that the Universe was not limited to the solar system, but is much vaster than that?
Sir William Herschel
47. Stars whose brightness increases to 20 magnitude or more due to explosion in the star is called?
Supernovae
48. What is a star?
A star is a gaseous self-luminous body in space
49. What is a parsec?
The word "parsec" is made up of the parts of the words "parallax" and "second". It means the distance from the Earth to a star whose parallax is one second of arc.
50. What does magnitude mean?
Magnitude is the measure of the brightness of a star or of any luminous body in the heaven
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