Gram-negative ((of bacteria) being of or relating to a bacterium that does not retain the violet stain used in Gram's method). Hyponyms (each of the following is a kind of bacteria): acidophil; acidophile (an organism that thrives in a relatively acid environment).
Gravity from the Sun reaches throughout the solar system and beyond, keeping the planets in their orbits. Gravity from Earth keeps the Moon and human-made satellites in orbit. It is possible to far away from a planet or star and feel less gravity, because gravity decreases with distance.But that doesn't account for the weightless feeling that astronauts experience in space.ravity from the Sun reaches throughout the solar system and beyond, keeping the planets in their orbits. Gravity from Earth keeps the Moon and human-made satellites in orbit. It is possible to far away from a planet or star and feel less gravity, because gravity decreases with distance.
A little atmospheric reflection gave the moon a mysterious ring of light overnight. The white ring that encircled the moon isn't much of a mystery, according to NASA scientists. The ring is caused by the reflection of the moon's light from ice crystals in the upper atmosphere. The hexagonal shape of the crystals causes the light to focus into a ring, according to the Ask an Astrophysicist feature on the Goddard Space Flight Center's Web site.