southern cross star constellation

southern cross star constellation插图


Which hemisphere can view the Southern Cross constellation?

The constellation Crux “the Cross” (also referred to as “the Southern Cross”) is the smallest constellation in the sky but it has held an important place in the history of the southern hemisphere. The brilliant cross is formed by bright stars making it one of the most familiar sights to southern hemisphere observers.

Can the Southern Cross constellation be seen from Hawaii?

Each year at this time, Hawaiians – or those at the latitude of Hawaii – can see the Southern Cross in the southern sky briefly before dawn. The Southern Cross, aka the constellation Crux, stands close to upright, but quite low in the sky, for the latitude of Honolulu.

What is the name of the Southern Cross constellation?

The stars of the crossAlpha Crucis or Acrux,at the foot of the cross,is the brightest star of the Southern Cross. It is the 14th brightest star in the night sky.Beta Crucis forms the eastern tip of the crossbar. …Gamma Crucis,at the top of the cross,is a red-orange star.Delta Crucis,at the western tip,is a blue-white giant star.Epsilon Crucis is the faint fifth star. …

What constellation can you see from the southern hemisphere?

Method 2 Method 2 of 2: From the Southern HemisphereWatch for the Pleiades in spring and summer. The Pleiades are visible from about October to April,during the Southern Hemisphere’s spring and summer months.Face the northern sky. During late November,the Pleiades rise in the northeast around dusk and travel west until dawn.Look for a line of bright stars. …More items…

What is the brightest star in the constellation Crux?

α Crucis (Alpha Crucis), also known as Acrux or HD 108248, is a bluish star that marks the bottom of the Southern Cross when you are facing south. It is the brightest star in the constellation Crux.

What is the magnitude of Alpha Crucis?

Acrux lies at a distance of 321 light years from Earth. It has an absolute magnitude of -4.14.

How many stars are in the Southern Cross?

As the Southern Cross dominates Crux constellation, it is often confused for the constellation itself, which contains more than five stars. The stars that form the cross asterism are just the brightest ones located in the constellation. The cross-shaped pattern can easily be seen from the southern latitudes at any time of year. Observers in the tropical latitudes of the northern hemisphere can see it near the horizon in winter and spring, but only for a few hours every night.

Where is the coalsack in the sky?

The Coalsack is located approximately 600 light-years away from Earth in the southern part of the constellation of Crux (the Southern Cross).

Which constellations have the brightest stars?

Two of the brightest stars that form the cross, Alpha Crucis and Beta Crucis, are among the brightest stars in the sky and easily visible from the southern hemisphere. The stars Alpha, Beta and Delta Crucis are co-moving members of the Scorpius-Centaurus Association, a young association of stars in the constellations Scorpius and Centaurus that belong to the spectral class O and B, have common proper motion, and are believed to have formed inside the same giant molecular cloud.

Where does the name Mimosa come from?

β Crucis (Beta Crucis), or Becrux, is also known by a proper name, Mimosa. The name, derived from the Latin word for “actor,” likely came from the flower. It is the second brightest star of the Southern Cross asterism. It is at approximately -60° declination and can’t be seen north of 30°N.

Why is the Southern Cross important?

The Egyptians saw it as representative of the place where Horus, the Sun goddess, was crucified, marking the passage of winter . The Aborigines and the Maori saw the cross as symbolizing animist spirits that were integral in their ancestral beliefs. The Aborigines saw Crux and the Coalsack Nebula as marking the head of the “Emu in the Sky.”

How far is Gacrux from Earth?

The last major star , Gacrux, is the dimmest of the four with the distance from Earth being 364 light years. Its magnitude is 2.8. Other stars attributed to this constellation are epsilon crucis, lota crucis and mu crucis. They are 228, 125 and 370 light years from Earth.

What countries have the crux?

It is included in the flag designs of 5 countries; Brazil, Australia, New Zealand, Samoa and Papua New Guinea. When included in flags, the crux is a national symbol. In the Brazil flag, the five-pointed star pattern that is white in color was introduced as a replacement for arms of the Empire of Brazil. The Southern Cross, in form of 4 large and 1 …

What are the objects associated with the Southern Cross?

Deep sky objects associated with the Southern Cross are the Coalsack nebula and the fuzzy star-like open cluster NGC4755.

How far away is the beta star from Earth?

The closely related blue hued beta star is 353 light years from the earth and possesses a magnitude of 1.3. The gamma star is red hued with a primary and a secondary component, whose magnitudes are 1.6 and 6.5 respectively. The primary is 88 light years from Earth whereas the secondary is 264 light years from Earth.

What are the components of the Southern Cross?

There however are other deep sky objects which are within the borders of the crux. Alpha (Acrux), beta (Mimosa), gamma and delta (Gacrux) form the major constituent stars of the crux.

What is the Southern Cross?

The Southern Cross in the Milky Way. The Southern Cross is the smallest and one of the eighty eight known constellations in the galaxy. Also known as The Crux, it is comprised of four or five major stars arranged in a cross like pattern and visible in the southern sky at night. These stars are labeled alpha, beta, gamma, delta and epsilon.

Where is the Southern Cross visible?

The Southern Cross is visible in the southern hemisphere, but in winter and spring at night for a few hours it is visible from the northern hemisphere at the tropical latitudes. This constellation is highly symbolic to some nations in that hemisphere, having been used as a navigation aid.

What is the smallest constellation in the world?

Crux is the smallest of the 88 constellations, occupying an area of only 68 square degrees. It is located in the third quadrant of the southern hemisphere (SQ3) and can be seen at latitudes between +20° and -90°. The neighboring constellations are Centaurus and Musca.

Where is the coalsack nebula?

The Coalsack Nebula is a famous dark nebula, easily seen as a large dark patch in the southern region of the Milky Way. It stretches across nearly seven by five degrees of the sky, crossing over into the neighbouring constellations, Centaurus and Musca. It is between 30 and 35 light years in radius.

How many days does Theta-2 Crucis orbit?

It has a visual magnitude of 4.30. Theta-2 Crucis is also a spectroscopic binary star, composed of a pair of stars that orbit each other with a period of 3.4280 days. The star system has a stellar classification of B2 IV. It is about 750 light years distant from the solar system and has an apparent magnitude of 4.72.

How are Alpha and Crucis separated?

The two are separated by four arc seconds. Both stars are very hot, almost class O, and their respective luminosities are 25,000 and 16,000 times that of the Sun. Alpha-1 Crucis is a spectroscopic double, with 14th and 10th magnitude components orbiting each other with a period of 76 days.

What is the meaning of the word "crux"?

Crux means “the cross” in Latin. Ancient Greeks considered Crux to be a part of the constellation Centaurus. Even though its stars were charted on most celestial globes, it was not until 1679 that it became a constellation in its own right. It was the French astronomer Augustin Royer who formally separated Crux from Centaurus. Some historians credit the Dutch astronomer Petrus Plancius for creating the constellation in 1613, as it was published by Jakob Bartsch in 1624.

What is the Southern Cross?

Crux, or the Southern Cross, is a prominent constellation in the southern sky. It is the smallest of all 88 constellations. In spite of its size, Crux is one of the best known constellations in the southern hemisphere. It is easily recognizable for the cross-shaped asterism, the Southern Cross, formed by its five brightest stars.

How many stars are in the constellation Crux?

Crux contains six named stars. The proper names of stars that have been officially approved by the International Astronomical Union (IAU) are Acrux, Gacrux, Ginan, Imai, Mimosa, and Tupã. Crux constellation map by IAU and Sky&Telescope magazine.

How to find the direction of the south celestial pole?

For example, a line drawn from the star Gacrux through the star Acrux points in the general direction of the south celestial pole (the point in the sky directly above the Earth’s south pole).

Where is the upside down dipper in the sky?

When the Southern Cross sails highest up in the Southern Hemisphere sky, the “upside-down” Big Dipper is seen just above the northern horizon at latitudes near the tropic of Capricorn (23.5 degrees south latitude). Dr Ski in Valencia, Philippines – 7 degrees north latitude – captured this image on April 30, 2019.

What star is on the left of the Southern Cross?

On the left of this cross are the 2 pointer stars, Alpha Centauri (Rigel Kentaurus) and Beta Centauri (Hadar). They point to the Southern Cross.”. Thanks, Kannan! The Southern Cross – also known as Crux – is an iconic constellation for people south of the equator.

What latitude is Stephen?

Stephen is at about 20 degrees north latitude. Thank you, Stephen! How to use the Big Dipper as a guide. Although the Big Dipper is a fixture of the Northern Hemisphere skies, this star formation has a close kinship with the Southern Cross.

When do the Big Dipper and Southern Cross reach their highest point in the sky?

Remember spring up and fall down. That’s Northern Hemisphere spring we’re talking about. The Big Dipper soars highest in the sky on late northern spring evenings.

When is the Southern Cross visible?

In April and May, the Southern Cross reaches its highest point in the sky earlier in the evening. Thank you, Prateek! Finding the Southern Cross from the Northern Hemisphere. At 35 degrees south latitude and all latitudes farther south, you can see the Southern Cross at any hour of the night all year around.

Where can I see the Southern Cross?

You can see see all of Crux from the U.S. state of Hawaii. In the contiguous U.S., you need to be in southern Florida or Texas (about 26 degrees north latitude or farther south). Even from the far-southern contiguous U.S., you have a limited viewing window for catching the Southern Cross. It has to be the right season of the year. It has to be the right time of night. And you have to look in the right direction: south!

What does a crux look like?

Crux certainly looks like an almost perfect small cross, perhaps marred to a slight degree by a dim, superfluous fifth star. (Two of the main four stars, Acrux and Becrux, are of first-magnitude brightness.) [ See Saturn’s Rings and More: May 2015 Skywatching Video]

What constellation is the Southern Cross?

In some strange and mysterious way, the four stars that comprise the constellation Crux — better known as the Southern Cross — have come to represent the lands that lie below the equator.

What is the name of the hole in the sky that absorbs the light of the stars?

Indeed, few stars are seen within this hole, and it soon became popularly known as the "Coalsack.". People initially thought the Coalsack was some sort of window into deep space, but today we know that it’s really a great cloud of gas and dust that absorbs the light of the stars that must lie beyond it.

How tall is Crux?

From top to bottom, Crux measures just 6 degrees — only a little taller than the distance between the pointer stars of the Big Dipper. (Reminder: Your clenchd fist held at arm’s length is 10 degrees wide.) In fact, the Southern Cross is the smallest (in area) of all the constellations. Like the Big Dipper of the northern sky, …

How far south can you see the Crux?

To see Crux, one must go at least as far south as 25 degrees north latitude. For example, you could head to the Florida Keys, where you’ll see it just lifting fully above the southern horizon. The Cross appears noticeably higher from Puerto Rico and the islands of the Caribbean, as well as Hawaii. Admittedly, Crux is far from being …

How many stars are on the Brazilian flag?

Additionally, Crux is not the only constellation that is represented on the Brazilian flag. This banner holds a total of 27 stars, each representative of a Brazilian state or its federal district. All of these stars are depicted on a globe, with their positions plotted for 20:30 local time on Nov. 15, 1889 over Rio de Janeiro, to commemorate the date when Emperor Dom Pedro II was deposed and Marechal Deodoro Da Fonseca declared Brazil a republic.

What is the smallest constellation in the sky?

In fact, the Southern Cross is the smallest (in area) of all the constellations. Like the Big Dipper of the northern sky, the Southern Cross indicates the location of the pole and as such is often utilized by navigators.

Did you know?

The Southern Cross was an important symbol for the Egyptians, as it represented the place where Horus, the Sun-goddess, was crucified, marking the passage of winter.

What constellation is the Southern Cross in?

The Southern Cross Asterism. The Southern Cross is a cross-shaped or kite-shaped asterism located in the constellation of Crux. The brightest star in Crux is also the brightest star in the Southern Cross asterism, namely, Acrux.

What is the name of the asterism in the southern hemisphere?

The Southern Cross asterism is among the best-known asterisms in the southern hemisphere.

What is the Southern Cross asterism?

The Southern Cross asterism is among the most recognizable star patterns in the southern hemisphere. It dominates the constellation of Crux, which is the smallest of the 88 modern constellations. The constellation of Crux is associated with many stories and it figures prominently in several mythologies in the southern hemisphere.

Where do Acrux and Gacrux point?

Acrux and Gacrux point the way to the Southern Celestial Pole.

How bright is Mimosa?

Mimosa has an apparent magnitude of 1.25. This star is a binary star, and a third component star is also suspected of being part of the system. Mimosa is located at around 280 light-years away from Earth. Mimosa is 34,000 times brighter than our Sun, having 1600% of its mass, and 840% of its radius.

Which constellation is circumpolar?

It holds special importance in Australia and New Zealand, where the constellation of Crux is circumpolar and can be seen throughout the year. The primary star of the Southern Cross, Acrux, is the 13 th brightest star in the sky, and it is actually a multiple star system.

What is the flag of Papua New Guinea?

The flag of Papua New Guinea depicts the Crux in the hoist and a Raggiana bird-of-paradise in the fly. The design was adopted in 1971 through a nationwide competition. Black and red have been the traditional colors of the tribes of the country, while the Raggiana bird is a native species. Other flags with the Southern Cross are those of Samoa and Tokelau.

How many stars does New Zealand have?

The flag of New Zealand resembles the flag of Australia but without the Commonwealth Star and the smaller five-pointed star of the Southern Cross. The Crux in the flag of New Zealand, therefore, has four stars instead of five.

What flags have the Southern Cross?

Flags That Feature the Southern Cross. The flag of Australia features the Southern Cross. The Southern Cross is a star constellation that is only visible from the deep southern sky throughout the year. It is also known as the Crux, which is a Latin word for cross.

How many stars are there in the Brazilian flag?

There are 27 stars in the Brazilian flag, each representing a federative unit. The initial flag adopted in 1889 had 21 stars, one more was added in 1960 to represent the state of Guanabara and another in 1968 to represent Acre. A further four stars were added in 1992.

Why is the Southern Cross on the flag?

The Southern Cross is portrayed in the flag of some countries in the Southern Hemisphere to represent their geographical position.

Who discovered the stars in the Southern Hemisphere?

European explorer Amerigo Vespucci documented the stars while on his third voyage to the Southern Hemisphere in 1501. The Crux was visible in the United States, Babylonia, and Greece 5000 years ago, but it began moving southwards due to the oscillating motion of the Earth axis. The constellation was visible on the horizon …

Where is the Southern Cross visible?

The Southern Cross is visible in the Southern Hemisphere throughout the year. It is also visible at the horizon of the tropical latitudes of the Northern Hemisphere during the northern spring and winter.

How to find the south celestial pole?

The sky’s south pole has no such bright star. But, if you’re in the Southern Hemisphere, you can indeed use the Southern Cross – also known as the constellation Crux – to find celestial south. Then you can draw a line downward from celestial south to find the direction due south.

What constellation is used to find the south celestial pole?

I didn’t know – and you might not realize if, like me, you live in the Northern Hemisphere – that you can use the constellation of the Southern Cross (which appears on both the Australian and New Zealand flags) to find the south celestial pole and the direction due south. An EarthSky community member, Steve Brown, pointed this sky trick out to us some years ago, and he also provided many links and references to finding south with the Southern Cross, many of which you’ll find in this post. Thank you, Steve!

How to find the direction of celestial south?

Then you can draw a line downward from celestial south to find the direction due south.

What are the clouds in the Milky Way?

These “clouds” are actually satellite galaxies orbiting our own larger Mil ky Way galaxy . If you spot them on a clear, moonless night in the Southern Hemisphere, make an equilateral triangle, the third point of which is the south celestial pole. Image via Michael Millthorn/ Wikimedia Commons.

Which publication shows how to use the Southern Cross to find the south celestial pole and the direction south?

The Australian Broadcasting Corporation (ABC) published the following two illustrations showing how to use the Southern Cross to find the south celestial pole and the direction south:

Which star is the southern pole?

In the Northern Hemisphere, the moderately bright star Polaris marks the north celestial pole and direction north. But there’s no bright southern star to mark the south celestial pole. Babak Tafreshi, a Photo Ambassador for the European Southern Observatory, captured this photo in 2012. Read more about this image via ESO.

Who is Deborah Byrd?

Deborah Byrd created the EarthSky radio series in 1991 and founded in 1994. Today, she serves as Editor-in-Chief of this website. She has won a galaxy of awards from the broadcasting and science communities, including having an asteroid named 3505 Byrd in her honor. A science communicator and educator since 1976, Byrd believes in science as a force for good in the world and a vital tool for the 21st century. "Being an EarthSky editor is like hosting a big global party for cool nature-lovers," she says.

What is the name of the constellation that means the Southern Cross?

Crux is the 88th largest in terms of size in the night sky. The constellation name means The Southern Cross . It was not one of the original constellations that had been devised by Ptolemy, instead it was created by Johann Bayer years later. There are 4 stars that make up the main constellation.

Which constellation is closest to the Northern Hemisphere?

There is no specific northern hemisphere equivalent although the constellation Cygnus comes close due to its near cross shape. The constellation is surrounded on three sides by the more famous Centaurus constellation which contains the closest stars to us, Rigil Kentaurus and Proxima Centauri.

How many degrees does Crux take up?

The sky is not divided up equally between the constellations. Crux takes up 68.447 sq. degrees of the night sky which equates to 0.17% of the night sky.

Why can’t you go to one location and arrive at the constellation?

You can’t just go to one location and arrive at the constellation because the constellation is made up of stars at different locations and different distances. The nearest main star in the constellation is at a distance of 88.56 light years and the furthest main star is a distance of 345.15 light years.

What is the furthest star in the constellation?

The furthest star that is located in the constellation is HIP 58278 and it is 108721.1 light years away from the Sun. The furthest figure is derived from either the 1997 or 2007 Hipparcos star catalogue parallax figure and it has been known to produce distances that are wrong.

Why is Ursa Minor used in nagivation?

In the northern hemisphere, Ursa Minor is the navigation constellation because it contains Polaris, the Pole Star.

What is the equator of the zodiac?

The Celestial Equator is the projection of the terrestrial equator into space. The Ecliptic is the path that the Earth takes round the Sun. The Earth is titled at 23.44° which is why the two differ. The Zodiac constellations are based on the Ecliptic.

What newspapers have been published under the name "New Zealand Herald"?

Two national newspapers have been published under the name: a successful paper from colonial days, which merged with the New Zealand Herald in 1876; and a short-lived Labour Party daily (1946–51).

What was the first plane to cross the Tasman Sea?

The first aeroplane to cross the Tasman Sea, in September 1928, was the Southern Cross, a three-engine Fokker, flown by Charles Kingsford Smith and C. T. P. Ulm. A number of ships have been named Southern Cross , but perhaps the most famous was the Shaw Savill passenger liner that brought assisted immigrants from Great Britain …

What is the constellation on the New Zealand flag?

Over a century later the constellation continues to be relevant to nationhood and national honour. It is depicted on the New Zealand Tomb of the Unknown Warrior, unveiled in 2004. Featured on the lid of the tomb, the stars are seen to have guided the warrior back to New Zealand from distant battlefields.

What is the Southern Cross constellation?

The Southern Cross constellation is one of the striking features of the southern hemisphere sky. It is one of the first star patterns that New Zealand children learn to recognise. The 16th-century European navigators who sailed into southern seas perceived it as a symbol of their Christian faith. The Southern Cross is evocative of place or origin to many peoples, appearing on national flags, company logos and memorials in New Zealand and elsewhere in the southern hemisphere.

Why did the stars of the Southern Cross disappear?

Once visible to ancient Greek astronomers, the stars of the Southern Cross disappeared from their view due to the rotating earth wobbling like a top (precessing). Although the Southern Cross is the smallest of the 88 official constellations, it has achieved prominence from its value as a navigational aid.

Where is the fifth star in the constellation?

The four brightest stars form a distinctive cross with a long axis and a short crossbar. A fifth star, located just below the crossbar, is often included in depictions of the constellation. This star is fainter than the others and not always visible.

Which flags have the Southern Cross?

Depicted either as four or five stars, the Southern Cross features on the national flags of New Zealand, Australia, Brazil, Papua New Guinea and Samoa.