The filter and color assignments are as follows: oxygen blue , hydrogen green , and sulfur red. The single-filter images of the light echo below right were taken in , , and with the CTIO 4-m Blanco telescope. Object Description The type of astronomical object. Position Right ascension — analogous to longitude — is one component of an object's position. Position Declination — analogous to latitude — is one component of an object's position.
Constellation One of 88 recognized regions of the celestial sphere in which the object appears. Distance The physical distance from Earth to the astronomical object. Distances within our solar system are usually measured in Astronomical Units AU. Distances between stars are usually measured in light-years. Interstellar distances can also be measured in parsecs. Dimensions The physical size of the object or the apparent angle it subtends on the sky. About The Data Data Description Proposal: A description of the observations, their scientific justification, and the links to the data available in the science archive.
Science Team: The astronomers who planned the observations and analyzed the data. The ultraviolet spectrum of the Eta Carinae star system shows many emission lines of ionized metal. The ionization levels and continuum hot central source, require the existence of a temperature of at least Eta Carinae is the only known star to have ultraviolet laser emissions.
This star is the brightest source in the night sky at mid-infrared wavelengths. The large mass of dust named the Homunculus has been estimated to have around 20 solar masses and temperatures of around K. The central region of the Homunculus contains an even smaller Little Homunculus, from the lesser eruption.
Eta Carinae is a powerful X-ray and gamma-ray source. The energy emissions vary during its orbital cycle. The highest energy gamma-rays detected were above MeV. Both stars are emitting enormous amounts of energy. Beta Carinae A is 5 million times brighter than our sun, while B is 1 million times brighter.
The temperatures are greatly debated. Beta Carinae A has been estimated to have around 9. Beta Carinae B has surface temperatures of around It is the most luminous star of this classification. Eta Carinae B is thought to be a young O-type star while some consider it to be an evolved supergiant star. Both stars have a semi-major axis of around They complete one orbit around each other once every 5. When they reach their closest point to one another, their magnitude reaches its peak.
They have been shown to not always follow their estimated orbit duration. Eta Carinae is located in the constellation of Carina. Eta Carinae is engulfed by the Homunculus Nebula. Carina was part of a larger constellation called the Argo Navis — this constellation represented the ship of Jason and the Argonauts.
The constellation was later divided into three lesser constellations: Carina — the keel — Puppis — the stern — and Vela — the sails.
The constellation of Carina is in the southern sky, very near to the south celestial pole. Because of this, it never sets for most of the southern hemisphere observers. Since Eta Carinae is quite a rare star, the prediction of its future is quite a difficult task.
Its future evolution is highly uncertain, but the star will certainly continue to lose huge amounts of its mass. The primary star will most likely explode as a supernova at any given time. Some predict it will happen anytime from now to one million years. The Eta Carinae star system is located at around 7.
This star system has an extensive history of massive eruptions which propelled it several times in the brightest star charts. A sequence of eight exposures was necessary to cover the object's huge dynamic range: the outer ejecta blobs are , times fainter than the brilliant central star.
Eta Carinae was the site of a giant outburst about years ago, when it became one of the brightest stars in the southern sky. Though the star released as much visible light as a supernova explosion, it survived the outburst. Somehow, the explosion produced two polar lobes and a large thin equatorial disk, all moving outward at about 1.
The new observation shows that excess violet light escapes along the equatorial plane between the bipolar lobes. Apparently there is relatively little dusty debris between the lobes down by the star; most of the blue light is able to escape.
The lobes, on the other hand, contain large amounts of dust which preferentially absorb blue light, causing the lobes to appear reddish. Estimated to be times more massive than our Sun, Eta Carinae may be one of the most massive stars in our Galaxy. It radiates about five million times more power than our Sun. The star remains one of the great mysteries of stellar astronomy, and the new Hubble images raise further puzzles. Eventually, this star's outburst may provide unique clues to other, more modest stellar bipolar explosions and to hydrodynamic flows from stars in general.
Position 10h 45m 3. Object Description The type of astronomical object.
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