Moforaja (http://moforaja.com/index.php)
- NAUKA I DRUŠTVO (http://moforaja.com/board.php?boardid=14)
-- NAUKA (http://moforaja.com/board.php?boardid=16)
--- NASA - foto dana (http://moforaja.com/threadid.php?threadid=14923)

i kratkog vodica o pulsarima za neupucene..
Pulsars are rapidly rotating neutron stars. Pulsar planets are planets that are found orbiting pulsars. The first such planet to be discovered was around a millisecond pulsar. Pulsar planets are discovered through pulsar timing measurements, to detect anomalies in the pulsation period. Any bodies orbiting the pulsar will cause regular changes in its pulsation. Since pulsars normally rotate at near-constant speed, any changes can easily be detected with the help of precise timing measurements.

In 2006 the pulsar 4U 0142+61, located 13,000 light years from Earth, was found to have a circumstellar disk. The discovery was made by a team led by Deepto Chakrabarty of MIT using the Spitzer Space Telescope.[1] The disk is thought to have formed from metal-rich debris left over from the supernova that formed the pulsar roughly 100,000 years ago and is similar to those seen around Sun-like stars, suggesting it may be capable of forming planets in a similar fashion. Pulsar planets would be entirely incapable of supporting any form of life as we know it due to the colossal amounts of electromagnetic radiation emitted by pulsars.

ovo je pulsar planeta..impresija, naravno

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vuja odlicno

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vuja
hercegovka

'ajmo na cas o plejadama(plave zvezde)..

The Pleiades (also known as M45 or the Seven Sisters) is the name of an open cluster in the constellation of Taurus. It is among the nearest to the Earth of all open clusters, probably the best known and certainly the most striking to the naked eye.

The cluster is dominated by hot blue stars, which have formed within the last 100 million years. Dust that forms faint reflection nebulosity around the brightest stars was thought at first to be left over from the formation of the cluster but is now known to be an unrelated dust cloud that the stars are currently passing through. Astronomers estimate that the cluster will survive for about another 250 million years, when it will have dispersed due to gravitational interactions with the spiral arms of the galaxy and giant molecular clouds.

Accurate knowledge of the distance to the cluster is very important in astronomy as it is a crucial first step on the cosmic distance ladder, the calibration of the distance scale of the whole universe. The cluster is now known to lie at a distance of about 135 parsecs (440 light years).

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i malo o istoriji plejada

The Pleiades are a prominent sight in the Northern Hemisphere in winter and in the Southern Hemisphere in summer, and have been known since antiquity to cultures all around the world, including the M
ori and Australian Aborigines, the Japanese, the Aztec and the Sioux of North America. Some Greek astronomers considered them to be a distinct constellation, and they are mentioned by Hesiod, and in Homer's Iliad and Odyssey. They are also mentioned three times in the Bible (Job 9:9, 38:31; Amos 5:8). The Pleiades (Kartika) are particularly revered in Hindu mythology as the seven mothers of the war god Skanda.

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Sta reci...nebula reflection

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i naravno Komete..gre'ota ih je izostaviti..

A comet is a small body in the solar system that orbits the Sun and (at least occasionally) exhibits a coma (or atmosphere) and/or a tail — both primarily from the effects of solar radiation upon the comet's nucleus, which itself is a minor body composed of rock, dust, and ices. Comets' orbits are constantly changing: their origins are in the outer solar system, and they have a propensity to be highly affected (or perturbed) by relatively close approaches to the major planets. Some are moved into sungrazing orbits that destroy the comets when they near the Sun, while others are thrown out of the solar system forever.

Comets are usually discovered visually or photographically using a wide-field telescope or other optical means of magnification, such as binoculars. However, even without access to optical equipment, it is still possible to discover a sungrazing comet online with a computer and an Internet connection. In recent years, Dave's Virtual Sungrazing Observatory DVSO has enabled many amateur astronomers world-wide to discover a new comet online (often in real time) using the latest SOHO Space Telescope images.

Most comets are believed to originate in a cloud (the Oort cloud) at large distances from the Sun consisting of debris left over from the condensation of the solar nebula; the outer edges of such nebulae are cool enough that water exists in a solid (rather than gaseous) state. Asteroids originate via a different process, but very old comets which have lost all their volatile materials may come to resemble asteroids.

The word comet came to the English language through Latin cometes. From the Greek word kom, meaning "hair of the head," Aristotle first used the derivation komts to depict comets as "stars with hair

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nadam se da se neki secaju ove na nebu...1997 leto...

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ova je (srecom) raspalila u Jupiter..Sumejker-Livi(shoemaker-levy-9)

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na ovom linku ima par ekstra fotografija

http://c-woodruf.tripod.com/bestof.htm

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Orion..

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jedna lepa galaksija ..cartwheel galaxy

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ljudi pogledajte dasnji foto dana na NASA stranici. fenomenalno

btw ja imam software koji se zove APOD i taj software svaki dan promijeni moj desktop i namjesti NASA fotodana. svaki dan se prijatno iznenadim sa novom slicicom.

APOD se moze besplatno downlodovati, samo guglaj i naci ces ga odma

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Jel' slika Jezero na Titanu?

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nije, radi se o zvijezdi gigantu Central Cygnus

ovdje mozes vidjeti:

http://apod.nasa.gov/apod/

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a jesi li video jezero na titanu?na nasi je isto..ludilo....a evo jednog vrhunskog sajta..ima svega..boljeg nisam video odavno

http://www.astronomija.co.yu/au/5000lys/5000lys.htm

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kad je rec o zvezdama evo i njihova klasifikacija i malo o njima

Ovaj dijagram prikazuje veæinu glavnih tipova zvezda. Ogromnu veæinu zvezda èine zvezde glavnog niza - to su zvezde poput Sunca koje sagorevaju vodonik u helijum da bi stvorile svoju energiju. Veæina zvezda provede 90% svog života kao zvezda glavnog niza. Kada zvezde iscrpe svoje vodonièno gorivo njihovi se spoljni omotaèi mogu izuzetno proširiti pa tada zvezda postane gigant. Ovaj proces traje samo nekoliko milliona godina pre nego što zvezda odbaci svoje spoljašnje omotaèe ostavljaljuæi degenerisano jezgro, ili u ekstremnim sluèajevima crnu rupu.

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Zvezde Orionovog pojasa prekrivene bledom maglièavošæu. Sa desna na levo: Delta Orionis (Mintaka), Epsilon Orionis (Alnilam) i Zeta Orionis (Alnitak).

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