Mercury and the general relativity theory Comet and asteroid perihelions The other "peris" Additional resources: Bibliography: The term "perihelion" refers to the point in the orbit of a planet or other astronomical body, at which it is closest to the sun. The word comes from Greek...
according toNASA Glenn Research Center. Even as the center of theEarthis pulling you toward it (keeping you firmly lodged on the ground), your center of mass is pulling back at the Earth. But the more massive body barely feels the tug from you, while with...
which states that “the orbit of a planet about the Sun is an ellipse with the Sun’s center of mass at one focus”. At perihelion (i.e. its closest) it is 147,095,000 km (91,401,000 mi) from
(from being in the control of someone or something else) evolved first in French and was in English by late 14c. For this, Old English had pleoh; in early Middle English this sense is found in peril. For sound changes, compare dungeon, which is from the same source....
a slow evolution in the orbit of the planet Mercury (perihelion precession) frame draggingof space-time around rotating bodies weakening of light escaping gravity's pull (gravitational redshift) gravitational waves(ripples in space-time fabric) caused by cosmic smashups ...
Lunar ‘Fountain of Youth’ Challenge / Mercury Returns with Gusto A day-old Moon floats over the Spirit Mountain ski hill in Duluth, Minn. this past January. Credit: Bob King 16th century Spanish explorer Juan Ponce de León looked and looked but never did find the Fountain of Youth, a...
So, dark matter proponents theorize that most of the known universe is actually made of material that doesn’t interact with light, making it invisible and undetectable — but that this material accounts for much of the gravitational pull among galaxies. It has been the pre...
“refracting medium” explanation for GR features, which retains Euclidean space and time in the same mathematical formalism. In essence, the bending of light, gravitational redshift, Mercury perihelion advance, and radar time delay can all be consequences of electromagnetic wave motion through an ...
Saturn will continue to shine in the southwestern sky during early evening in December, making it conveniently positioned for observing from dusk onwards - but the nightly westerly shift of the stars is carrying Saturn sunward, causing its set time for mid-northern latitude skywatchers to advance...
These shifting dates are because an Earth year is not exactly 365 days: There is an extra quarter of a day (6 hours) that accumulates each year, causing the date of the equinox to shift. The planet's orientation towards the sun is also constantly shifting, tweaking the timing of the equ...