The surface of blue and white stars shines

  • brightly
  • dimly
  • normally
  • colorfully

The gas will slowly disappear and be left only in the

  • center of sun
  • crust of sun
  • mantle of sun
  • sunspots

The whole universe was packed into a small mass about

  • 15,000 years ago
  • 15 million years ago
  • 15 billion years ago
  • 15 trillion years ago

Within seconds of explosion, atomic particles come together to make gases

  • oxygen and hydrogen
  • hydrogen and nitrogen
  • hydrogen and helium
  • oxygen and nitrogen

Our sun is situated in one of the spiral arms of the

  • Whirlpool galaxy
  • Black eye galaxy
  • Andromeda galaxy
  • Milky way galaxy

The radio waves are collected and changed in

  • mechanical signals
  • electrical signals
  • chemical signals
  • physical signals

The cloud of gas and dust forms a

  • disc
  • ball
  • galaxy
  • cube

To complete one rotation, sun takes approximately

  • two days
  • three days
  • four days
  • five days

A black hole may pull matter in from a nearby

  • galaxy
  • cluster
  • comet
  • star

The Earth's atmosphere acts as a filter to remove

  • radiation
  • gamma rays
  • x-rays
  • beta-rays

Galaxies that have not any formed shape are known as

  • lenticular galaxies
  • peculiar galaxies
  • elliptical galaxies
  • irregular galaxies

A reflecting telescope can collect light from a

  • faint object
  • close object
  • black object
  • white object

Electrical signals are used to make radio

  • spectrum
  • frames
  • images
  • station

Our atmosphere makes it very difficult to study

  • Sun
  • Moon
  • Earth
  • Jupiter

Astrology was developed in order to predict how constellations would affect the

  • sky
  • galaxies
  • human behavior
  • myths

In 1779, Edward pigott discovered a galaxy named

  • Black eye galaxy
  • Evil eye galaxy
  • Whirlpool galaxy
  • Andromeda galaxy

The 'galaxies' are extremely

  • hot
  • far apart
  • close
  • cold

Besides milky way, there are

  • hundreds of other galaxies
  • thousands of other galaxies
  • millions of other galaxies
  • gazillion of other galaxies

The number of basic shapes of 'galaxies' is

  • 2
  • 3
  • 4
  • 5

A revolution of earth takes about

  • a day
  • an hour
  • a year
  • a month

Sunspots are not always at the same place on the

  • galaxy
  • earth
  • moon
  • sun

If galaxies further move apart, hydrogen will be used in the production of new

  • planets
  • stars
  • galaxies
  • clusters

Solar panels are orbiting above the earth about

  • 600 meters high
  • 1200 meters high
  • 600 kilometers high
  • 1200 kilometers high

Ptolemy lived from 120 AD to

  • 170 AD
  • 180 AD
  • 190 AD
  • 200 AD

At light speed, reaching to sun from earth it will take approximately

  • 8 seconds
  • 8 minutes
  • 8 days
  • 8 years

Scientists believe that the whole universe is

  • shrinking
  • expanding
  • destroying
  • vanishing

Astronomers tuned up their telescopes to pick up radio waves from

  • close galaxies
  • distant galaxies
  • close stars
  • close clusters

After that gigantic explosion, our universe has been

  • shrinking
  • expanding
  • exploding
  • heating

The information sent by Ulysses is

  • most useful
  • less valuable
  • important
  • extremely valuable

Small mass is incredibly

  • light and cold
  • light and hot
  • dense and cold
  • dense and hot
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