<span>Mercury has 0.0553 earth's mass and has no natural satellite. It
is the planet closest to the sun and also the smallest, its surface is
rocky and solid like the earth, has a diameter of 4879 km and is formed
mainly of metal elements. <span>Its orbit around the sun is 88 days and its temperatures are extremely high due to its proximity to the sun.
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I hope my answer can help you.
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The math suggests that for every parsec the rate of moving away is 71 km/s, so when two galaxies are separated by two parsecs we come to 142 km/s speed of moving away from each other. If we take the first light ever (from what is known so far) the cosmic microwave radiation, is 46 billion light-years away from us at all directions, which comes at 4,200 megaparsecs, which comes at 13.7 billion light-years, so it will come to 29,820,000 km/s. It all depends from the distance between the galaxies which is calculated by their type of colour and movement in comparison to other galaxies.
LOTIC ECOSYSTEMS, CONSISTING OF RIVERS AND MAINSTREAMS, FREE-FLOWING WATER.
