Dies

Dies is a surname, and may refer to:

See also

Dies (deity)

In Roman mythology Dies ("day") was the personification of day, and the Roman counterpart of the Greek goddess Hemera, the daughter of Nox (Night) and Scotus (Darkness).

She is the goddess of the daytime and, according to Hesiod, the daughter of Erebus and Nyx (the goddess of night). Hemera is remarked upon in Cicero's De Natura Deorum, where it is logically determined that Dies (Hemera) must be a god, if Uranus is a god. The poet Bacchylides states that Nyx and Chronos are the parents, but Hyginus in his preface to the Fabulae mentions Chaos as the mother/father and Nyx as her sister.

She was the female counterpart of her brother and consort, Aether (Light), but neither of them figured actively in myth or cult. Hyginus lists their children as Uranus, Gaia, and Thalassa (the primordial sea goddess), while Hesiod only lists Thalassa as their child.

References

External links

C&R

C&R may refer to:

See also

CR

CR or Cr may refer to:

Organizations

Commercial Radio Hong Kong

People

Geographical locations

Countries

Other

Halley's Comet

Halley's Comet or Comet Halley (/ˈhæli/ or /ˈheɪli/), officially designated 1P/Halley, is a short-period comet visible from Earth every 75–76 years. Halley is the only known short-period comet that is clearly visible to the naked eye from Earth, and the only naked-eye comet that might appear twice in a human lifetime. Halley last appeared in the inner parts of the Solar System in 1986 and will next appear in mid-2061.

Halley's returns to the inner Solar System have been observed and recorded by astronomers since at least 240 BC. Clear records of the comet's appearances were made by Chinese, Babylonian, and medieval European chroniclers, but were not recognized as reappearances of the same object at the time. The comet's periodicity was first determined in 1705 by English astronomer Edmond Halley, after whom it is now named.

During its 1986 apparition, Halley's Comet became the first comet to be observed in detail by spacecraft, providing the first observational data on the structure of a comet nucleus and the mechanism of coma and tail formation. These observations supported a number of longstanding hypotheses about comet construction, particularly Fred Whipple's "dirty snowball" model, which correctly predicted that Halley would be composed of a mixture of volatile ices – such as water, carbon dioxide, and ammonia – and dust. The missions also provided data that substantially reformed and reconfigured these ideas; for instance, now it is understood that the surface of Halley is largely composed of dusty, non-volatile materials, and that only a small portion of it is icy.