A few days ago we heard the news of the first discovery of a planet outside the Milky Way. The M51 (Whirlpool Galaxy) galaxy, about 23 million light-years from Earth, has detected the presence of a planet the size of...
Galaxies can be classified into three main types: elliptical, spiral, and irregular. Hubble's morphological classification is a more detailed taxonomic method. Since the Hubble method classifies galaxies only on the basis of shape, it ignores the rate of star formation...
For more than 100 years, Curie's clothing, furniture, books, and laboratory notes have been radioactive. Curie's laboratory notebooks are still housed in lead - lined boxes in museums in France. Marie Curie's goods will still be radioactive for 1500 years.
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