Damon Mcknight
The Southern Cross constellation is a celestial landmark for explorers and travellers in the Southern Hemisphere. It is made up of four or five stars, depending on who you ask. The constellation is almost always visible in the Southern Hemisphere and is used for navigation. The Southern Cross is deeply rooted in Australian Aboriginal cosmology and features on the flags of Australia, Brazil, New Zealand, Papua New Guinea, and Samoa. To find the Southern Cross, viewers can use two pointer stars, Alpha Centauri and Beta Centauri, to guide the way.
| Characteristics | Values |
|---|---|
| Time to view | Mid-autumn and winter evenings, April, May, March, December, and January |
| How to find | Look for two bright stars on a diagonal, known as the "Pointers" (Alpha Centauri and Beta Centauri). The Southern Cross is above and to the left of the Pointers. |
| Shape | A diamond lying on its side, made up of four or five stars |
| Stars | Acrux (Alpha Crucis), Mimosa (Beta Crucis), Gacrux (Gamma Crucis), Imai (Delta Crucis), and Ginan (Epsilon Crucis) |
| Navigation | The Southern Cross can be used to find true south. A line drawn from Gacrux through Acrux points towards the south celestial pole. |
| Cultural significance | The Southern Cross is featured on the flags of Australia, Brazil, New Zealand, Papua New Guinea, and Samoa. It also appears on the coats of arms, passports, and currency of Brazil. In Australian Aboriginal astronomy, the Southern Cross is associated with various animal representations, including an emu, a possum, a stingray, and an eagle. |
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What You'll Learn
- The Southern Cross is made up of four or five stars
- Use the pointer stars Alpha Centauri and Beta Centauri to find the constellation
- The Southern Cross is almost always visible in Australia
- The Southern Cross is a navigational aid
- The Southern Cross has cultural significance for many Indigenous Australians
The Southern Cross is made up of four or five stars
The Southern Cross is a constellation that is visible mainly from the Southern Hemisphere. It has been a celestial landmark for explorers and travellers south of the equator, acting as a navigational aid.
To find the Southern Cross, viewers can use two "pointer stars," Alpha Centauri and Beta Centauri, which are also known as the ""Southern Pointers." These two bright stars form a diagonal line, with Alpha Centauri being the brighter of the two and closer to the horizon. The Southern Cross is located above and a little to the left of the Pointers, forming a diamond shape on its side.
The Southern Cross is the most visible part of the constellation Crux, which is the smallest constellation in the sky. It contains two first-magnitude stars, Acrux and Mimosa, and a total of five stars brighter than magnitude 3.00. Crux is easily visible from the Southern Hemisphere, particularly for those more than 35 degrees south, where the stars can be seen at any time of night, all year round. In the Northern Hemisphere, Crux can be seen from tropical latitudes below about 26 degrees north during the northern winter and spring.
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Use the pointer stars Alpha Centauri and Beta Centauri to find the constellation
The Southern Cross, also known as Crux, is a constellation that has been used for celestial navigation by intrepid explorers and travellers south of the equator. It is made up of four or five bright stars, surrounded by smaller stars and the Coalsack Nebula.
To find the Southern Cross, viewers can use two "pointer stars"—Alpha Centauri and Beta Centauri. Alpha Centauri is the brightest star in the constellation Centaurus the Centaur. It is also the closest star system to the Sun. Beta Centauri, also known as Hadar or Agena, is Alpha Centauri's close visual neighbour and is almost as bright. Together, they are called the Southern Pointers because they point directly to Crux.
To find the Southern Cross using the pointer stars, start by locating Alpha Centauri. In Australia and much of the Southern Hemisphere, Alpha Centauri is circumpolar, meaning that it never sets. From Alpha Centauri, draw a line downward through the crossbar stars to reach the bluish star Beta Centauri. From Beta Centauri, go three times the distance between the two pointer stars, and you will arrive at Gacrux, the star at the top of the Southern Cross.
The Southern Cross can be distinguished from the nearby False Cross by using the pointer stars. The Pointers help skywatchers separate the true Southern Cross from the fainter False Cross, which is much bigger.
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The Southern Cross is almost always visible in Australia
The Southern Cross is a celestial landmark that has guided explorers and travellers south of the equator for centuries. It is made up of four or five stars, depending on who you ask. The four main stars are Acrux (Alpha Crucis), Mimosa (Beta Crucis), Gacrux (Gamma Crucis), and Imai (Delta Crucis). Acrux is the southernmost star, while Gacrux is the farthest north. Mimosa and Imai form the crossbeam. The fifth star, Ginan (Epsilon Crucis), is included in some depictions of the Southern Cross, such as the national flags of Australia, Papua New Guinea, Samoa, and Brazil.
The Southern Cross is part of the constellation Crux, which is the smallest of the 88 officially recognized constellations. It is located very close to the South Celestial Pole, which means it is almost always visible from anywhere in Australia. In fact, Crux is visible all year round for viewers more than 35 degrees south, and it can be seen at some times of the year for those in the Northern Hemisphere below about 26 degrees north. From the Northern Hemisphere, the cross will generally appear vertical, but in the Southern Hemisphere, it can appear to be lying on its side or upside down, depending on the month and the time of night.
To find the Southern Cross, you can use two "pointer stars," Alpha Centauri and Beta Centauri, to guide the way. These two bright stars are commonly known as the "Pointers" because they seem to point towards the Southern Cross. The Southern Cross itself is above and a little to the left of the Pointers. It looks like a diamond lying on its side. With the naked eye, you should be able to see a small star near Mimosa, the bright star that forms the left-hand point of Crux.
The Southern Cross has been incorporated into the culture and traditions of many Indigenous Australian groups. For example, the Torres Strait Islander peoples have a constellation known as Tagai, a great fisherman who goes fishing with 12 spirit beings. In the sky, Tagai can be seen standing in his canoe, with the Southern Cross as his left hand, holding a spear. When Tagai's left hand dips into the sea, the Islanders know that the wet season (Kuki) is about to begin. The Southern Cross also holds cultural significance for the Aranda, Wiradjuri, Ngarrindjeri, Kaurna, Ngadjuri, Nukunu, and Adnyamathanha peoples, among others.
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The Southern Cross is a navigational aid
The Southern Cross, a constellation in the southern sky, has long been a navigational aid for intrepid explorers and travellers south of the equator. It is made up of four or five stars, depending on who you ask. The four main stars are Acrux (Alpha Crucis), Mimosa (Beta Crucis), Gacrux (Gamma Crucis), and Imai (Delta Crucis). Acrux is the southernmost star, while Gacrux is the farthest north. Mimosa and Imai form the crossbeam.
The Southern Cross is fairly easy to visualise as it stands upright over the horizon. To find it, viewers can use two "pointer stars", Alpha Centauri and Beta Centauri, to guide the way. These two stars are commonly known as the "Pointers" because they seem to point towards the Southern Cross. The Southern Cross itself is above and a little to the left of the Pointers. It looks like a diamond lying on its side.
The Southern Cross can be used to find the direction due south. 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 Earth's south pole).
The Southern Cross holds cultural significance for many Southern Hemisphere nations and appears on the flags of Australia, Brazil, New Zealand, Papua New Guinea, and Samoa. It is also featured in the oral traditions of several Indigenous Australian groups, including the Kulin, Noongar, Wotjobaluk, Kurnai, Ya-itma-thang, Ngarrindjeri, Wiradjuri, and Torres Strait Islander peoples.
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The Southern Cross has cultural significance for many Indigenous Australians
The Southern Cross constellation, also known as Crux, has been a part of Australia's First Nations cosmology for millennia. It has been used on flags and coats of arms since the early colonial period. In 1854, the Southern Cross was chosen as the central emblem for the Eureka flag. The constellation has been considered a symbol of rebellion and freedom.
The diverse cultures of Indigenous Australia hold many stories about the stars. In the Torres Strait, the Southern Cross is seen as the left hand of Tagai. In south-eastern Australia, the Boorong of Lake Tyrell saw the constellation as Bunya, the possum, being pursued by the Emu. Importantly, Indigenous Australian cultures didn't view the Southern Cross as the most prominent constellation, but rather as one of many stories of the skies.
The Southern Cross was also significant for European voyagers in the 15th century, who regarded it as a sign of divine blessing for their conquests. Portuguese and Spanish navigators named it as a cross, associating it with the cross of Christ in the Southern Hemisphere. The constellation served as a navigational aid, helping explorers find their way south of the equator.
Today, the Southern Cross continues to hold appeal for many Australians, often featuring in designs for a new national flag. However, it has also been appropriated by elements of the racist right, making it a difficult emblem for many Indigenous and non-white Australians.
To find the Southern Cross in the night sky, viewers can use two bright "pointer stars," Alpha Centauri and Beta Centauri. These stars will guide you to the constellation, which looks like a diamond lying on its side, made up of four or five stars. The Southern Cross is best viewed in April, during mid-autumn, and over winter evenings.
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Frequently asked questions
The Southern Cross is made up of four or five stars, depending on who you ask. To find it, you can use two "pointer stars", Alpha Centauri and Beta Centauri, to guide the way. The Southern Cross itself is above and a little to the left of the Pointers. It looks like a diamond lying on its side.
The Southern Cross holds cultural significance in Australia, featuring on the Australian flag and in various Aboriginal stories. It has also been used for navigation, as its long line points south.
April is a great time to start viewing the Southern Cross in Australia, as it can be seen over mid-autumn and winter evenings. It is also visible in other months, but not at as convenient a time. In March, for instance, you have to wait until about 1 am to catch it at its highest elevation.
