In our galaxy, there are about

  • 1000 stars
  • 2000 stars
  • 500,000 million stars
  • 500 million stars

Huge explosions over the surface of sun are known as

  • sun flares
  • solar flares
  • solar explosions
  • sunspots

The sun looks to us the brightest star of the solar system because it is hundred and thousand times close to us than other

  • galaxies
  • comets
  • stars
  • black holes

Sirius can be seen from

  • mid southern latitude
  • mid northern latitude
  • equator
  • south pole

Earth sized white dwarf has a mass equal to that of

  • Moon
  • Sun
  • Jupiter
  • Saturn

In the universe approximate number of galaxies is

  • 100,000 thousands
  • 100,000 millions
  • 100,000 billions
  • 100,000 trillions

When last star would shine and die, the universe will turn

  • extremely hot
  • extremely cold
  • very small
  • even larger

Many stars give out more

  • ultraviolet light
  • visible light
  • infrared light
  • non visible light

By observing sunspots, scientists found that different parts of sun takes different lengths of time to

  • blast
  • cool down
  • rotate
  • heat up

The gravity of a black hole is so high, even light cannot escape

  • escape
  • trap
  • control
  • all of above

How many constellations are there in the sky?

  • 40
  • 88
  • 45
  • 80

Ancient people believed that constellations were

  • useless
  • useful
  • special
  • galaxies

The spiral shaped system is known as

  • solar system
  • galaxy
  • cluster
  • comet

The name of our galaxy is

  • Whirlpool galaxy
  • Black eye galaxy
  • Andromeda galaxy
  • Milky Way galaxy

'Ulysses' also transmits information of

  • inner core
  • mantle
  • solar wind
  • outer core

Galaxies pull

  • stars
  • comets
  • each other
  • universe boundaries

The largest split aerial telescope contains

  • 20 dishes
  • 23 dishes
  • 25 dishes
  • 27 dishes

Milky way galaxy has most of its stars

  • on its boundary line
  • in the center
  • at the corners
  • behind its boundary line

If we observe space for the whole year, we would see different stars every

  • year
  • month
  • season
  • week

The dark spots on the surface of sun are known as

  • dark spots
  • sunspots
  • low spots
  • cool spots

"Ulysses" reached to the sun in

  • 1991
  • 1992
  • 1993
  • 1994

Every star radiates different combination of

  • visible lights
  • invisible lights
  • visible and invisible lights
  • sounds and waves

The temperature at the center of sun is about

  • 40,000 °C
  • 50,000 °C
  • 15 millions °C
  • 150,000 °C

All large telescopes that are used around the world, are

  • Radio telescopes
  • Reflecting telescopes
  • Refracting telescopes
  • Hubble telescope

Sun is also called

  • yellow star
  • blue giant
  • red supergiant
  • white dwarf

In space besides stars, there is also a huge capacity of dust and

  • asteroids
  • meteoroids
  • gases
  • vacuum

The full form of "SDO" is

  • Sun Determining Observatory
  • Solar Determining Objective
  • Solar Dynamic Objective
  • Solar Dynamics Laboratory

Names of two stars of "Sirius" are

  • Sirius-1 and Sirius-2
  • Sirius-X and Sirius-Y
  • Sirius-A and Sirius-B
  • Sirius-I and Sirius-II

A single teaspoon of a 'white dwarf' would weigh many

  • kilograms
  • milligrams
  • tons
  • pounds

For all hydrogen to be used up, it will take more than

  • 5,000 years
  • 5 million years
  • 5 billion years
  • 5 trillion years
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