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    Learn English > English lessons and exercises > English test #125803: Astronomy
    > Other English exercises on the same topics: Geography, history, politics, literature... | Nature [Change theme]
    > Similar tests: - In the sea - Animals and pictures - Geography-Vocabulary - Fruit-trees - In the garden-vocabulary - Flowers - Vocabulary: Sea animals - Vocabulary: Animal sounds/cries
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    Astronomy


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    English exercise "Astronomy" created by baboune16 with The test builder. [More lessons & exercises from baboune16]
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    1. At the moment,more than 4,500 have been discovered and confirmed ; however thousands more require further confirmation.

    2. The Earth is located in one of the spiral arms of our , the Milky Way.

    3. Virgo Cluster is one of the well-known .

    4. HST or Hubble is a that was launched into a low orbit in 1990.

    5. A is a type of neutron star believed to have a very powerful magnetic field.

    6. Astronomical is the study of astronomy using the techniques of spectroscopy to measure the spectrum of electromagnetic radiations.

    7. A is a star whose brightness, as seen from Earth, fluctuates.Those stars are classified as intrinsic or extrinsic variables.

    8. Tycho's Nova is one of the few recorded in the Milky Way.The astronomer Tycho Brahe discovered it in 1572.

    9. Lewis is an who uses a telescope and computers in an observatory.

    10. A is a region of spacetime where gravity is so strong that nothing, even radiation such as light, can escape from it.










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