Frozen water pipes often burst, will a mercury thermometer break if the temperature of the thermometer is brought
below the freezing point of mercury?

Therefore, when the temperature drops below 4°C, the volume of the water increases continuously. Therefore, frozen water pipes burst. Mercury contracts when cooled, so a mercury thermometer would not break if the temperature went below the freezing temperature of mercury

Neptune is the eighth planet from the sun. it was the first planet to get its existence predicted by  mathematical calculations  before it was actually seen through a telescope on sept. 23, 1846. irregularities in the orbit of  uranus  led french astronomer alexis bouvard to suggest that the gravitational pull from another celestial body might be responsible. german astronomer johann galle then relied on subsequent calculations to   spot neptune via telescope. previously, astronomer galileo galilei sketched the planet, but he mistook it for a star due to its slow motion. in accordance with all the other planets seen in the sky, this new world was given a name from greek and roman mythology — neptune, the roman god of the sea.

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