18/12/2024
In the Southern Hemisphere we are lucky enough to be able to see with the naked eye the Large and Small Magellanic Clouds which are dwarf galaxies that orbit our own galaxy the Milky Way. These two galaxies are relatively close at 200,000 and 160,000 light years away from the Earth
More distant galaxies that are millions of years away present a greater challenge as even though these are huge objects that may be hundreds of thousands of light years across, the distances to these galaxies from the Earth are astronomically huge. Light travels 299792 kilometres per second which adds up to 9.46 trillion (9.46 x 10¹²) kilometres travelled in just one year. Light from many galaxies left on its journey to us millions of years ago, some around the time that the dinosaurs went extinct on the Earth.
The images of galaxies shown here are from Stellarium which is a freely available planetarium software that offers detailed live views of astronomical objects in the sky at any location in the world. These images from Stellarium are like the images that we see of these galaxies through our telescopes at Hamurana.
Galaxies that we have observed at Hamurana include –
• The String of Pearls Galaxy (Caldwell 72, NGC 55) is approximately 6.5 million years from the Earth and easily located by star hopping from the star Ankaa in the head of the Phoenix constellation.
• The Southern Pinwheel Galaxy (Caldwell 70, NGC 300) is a classic spiral galaxy much like the Milky Way and is about 6.45 million light years from the Earth. The Southern Pinwheel Galaxy is between the Phoenix and Sculptor constellations and thought to be gravitationally bound to the Strings of Pearls galaxy.
• The Sculptor Galaxy (also known as the Silver Coin or Silver Dollar galaxy Caldwell 65, NGC 253) is 11.6 million light years away from the Earth. The Sculptor galaxy can be found between the Cetus and Sculptor constellations
• Centaurus A or the Hamburger Galaxy (Caldwell 77, NGC 5128) is thought to be an example of two galaxies that have collided. A dark dust lane protrudes from centre of this galaxy. The Hamburger Galaxy is approximately 16 million light years from the Earth and can be found by star hopping from Alpha Centauri (Rigel Kentaurus) binary star.
• Fornax A and B (NGC 1316 and NGC 1317) are 55 million years away from the Earth. These two galaxies along with others are visible from Hamurana in the spectacular Fornax Galactic cluster.
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