The Perihelion Effect

Joseph Schuster

Earth at Perihelion

Earth at Perihelion On January 4, 2001, our planet made its annual closest approach to the Sun.Listen to this story (requires RealPlayer) January 4, 2001 — This morning at 5 o’clock Eastern Standard time (0900 UT) Earth made its annual closest approach to the Sun — an event astronomers call perihelion. Northerners shouldn’t expect any relief from the …

Earth at Perihelion Read More »

Abductive reasoning

Abductive reasoning “Abductive” redirects here. For other uses, see Abduction (disambiguation). Abductive reasoning (also called abduction,[1] abductive inference[2] or retroduction[3]) is a form of logical inference which goes from an observation to a theory which accounts for the observation, ideally seeking to find the simplest and most likely explanation. In abductive reasoning, unlike in deductive reasoning, the premises do not guarantee the conclusion. One can understand abductive …

Abductive reasoning Read More »

Winter Solstice

Winter Solstice — from Eric Weisstein’s World of Astronomy   As the Earth travels around the Sun in its orbit, the north-south position of the Sun changes over the course of the year due to the changing orientation of the Earth’s tilted rotation axes with respect to the Sun. ThisQuickTime movie illustrates the tilt of the Earth’s equatorial plane …

Winter Solstice Read More »

Gnomon is the part of a sundial that casts the shadow

Gnomon A gnomon ([ˈnoʊmɒn], from Greek γνώμων, gnōmōn, literally: “one that knows or examines”[1][2]) is the part of a sundial that casts the shadow. The term has come to be used for a variety of purposes in mathematics and other fields. History Anaximander (610–546 BC) is credited with introducing this Babylonianinstrument to the Greeks.[3] Oenopides used the phrase drawn gnomon-wise to describe a line drawn perpendicular to another.[4] Later, the term …

Gnomon is the part of a sundial that casts the shadow Read More »

Frequently Asked Questions about Calendars

Frequently Asked Questions about Calendars Version 2.8 Claus Tøndering 15 December 2005 URL: http://www.tondering.dk/claus/calendar.html Copyright and disclaimer This document is Copyright ⃝c 2005 by Claus Tøndering. E-mail: claus@tondering.dk. (Please include the word “calendar” in the subject line.) The document may be freely distributed, provided this copyright notice is included and no money is charged for …

Frequently Asked Questions about Calendars Read More »

Seasonal changes in 24-h patterns of suicide rates: a study on train suicides in The Netherlands

Seasonal changes in 24-h patterns of suicide rates: a study on train suicides in The Netherlands. van Houwelingen CA, Beersma DG. Department of Psychiatry, Groningen University Hospital, Groningen, The Netherlands. cajvhou@knmg.nl BACKGROUND: Annual patterns in suicide rates, peaking near the summer solstice, are well documented. It has been suggested that day length or total hours …

Seasonal changes in 24-h patterns of suicide rates: a study on train suicides in The Netherlands Read More »

Equinoxes, Solstice, Cross Quarters shown as seasonal cusps, worshipped by pagans and later religious holidays

http://www.archaeoastronomy.com/seasons.html http://www.archaeoastronomy.com/countdowns.html   http://www.archaeoastronomy.com/seasonal_cusps.mp4 Until 500 years ago most people other than a few far-sighted philosophical scientists imagined the sun, the planets and the stars all revolved around a stationary earth. After all, the same heavenly track made by the sun during the day is the planetary passageway at night. Eventually, the earth was shown …

Equinoxes, Solstice, Cross Quarters shown as seasonal cusps, worshipped by pagans and later religious holidays Read More »

Kepler’s Law Question

Kepler’s Law Question: According to Kepler’s law the Earth is closer to the sun in the summer winter than in the summer. If this is true would not it be warmer in the winter than in the summer? ———————————————— Answer: The reason for summer and winter is not because of the distance from the earth …

Kepler’s Law Question Read More »