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Before 2006, Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune, and Pluto were considered as planets. Below is a partial list of these mnemonics: "Men Very Easily Make Jugs Serve Useful Needs, Perhaps" – The structure of this sentence, which is current in the 1950s, suggests that it may have originated before Pluto's discovery.
The first one I learned (in the mid 1950's) was "Man very early made jars serve useful needs, period." (None too good, I agree.) I suspect this predates the discovery of Pluto, when the "period" was added. Also, the original form of the "My very energetic mother" mnemonic featured pickles, not pizzas. (Unimportant, of course.)
Back on the Earth, two very different factions compete to determine the future of humanity: the Free Scientists, who refuse to accept political, racial and religious divisions, and the nationalists. Armed men seize control of one of the space stations orbiting the planet, convert it into a weapon, and (perhaps accidentally) devastate most of ...
The Oort cloud is thought to be composed of comets that were ejected from the inner Solar System by gravitational interactions with the outer planets. Oort cloud objects move very slowly, and can be perturbed by infrequent events, such as collisions, the gravitational effects of a passing star, or the galactic tide, the tidal force exerted by ...
Children of Time is a 2015 science fiction novel by author Adrian Tchaikovsky.The novel follows the evolution of a civilization of genetically modified Portia labiata (arachnoid) on a terraformed exoplanet, guided by an artificial intelligence based on the personality of one of the human terraformers of the planet.
The naked eye planets, which include Mercury, Mars, Jupiter, and Saturn, will not all become visible in Tennessee until around 5 a.m. Central Time, since Mercury and Jupiter are very low in the sky.
Each night the planet appeared to lag a little behind the stars, in what is called prograde motion. Near opposition, the planet would appear to reverse and move through the night sky faster than the stars for a time in retrograde motion before reversing again and resuming prograde. Epicyclic theory, in part, sought to explain this behavior.
The parade of planets will be visible throughout the northern hemisphere and will peak on June 3. While there are six planets in play, we’ll only be able to view two easily with the naked eye ...