A guide to what's up in the sky for Southern Australia
Starwatch May 2024 - Thu 2nd May 2024
Published 2nd May 2024
A myriad of bright stars adorn the late autumn evening sky.
Galaxy NGC 5128 - Wed 1st May 2024
Published 1st May 2024
Galaxy NGC 5128—Centaurus A
Comet Pons-Brooks - Wed 10th Apr 2024
Published 10th Apr 2024
Looking west on the evening of April 27., 30 minutes after sunset. Locate the orange star Aldebaran, then scan to the left until you come to a fuzzy spot in the sky. Train your binoculars on it, the comet will be 239 million kilometres away. Graphic generated with Stellarium planetarium software.
M104 - The Sombrero Galaxy - Tue 9th Apr 2024
Published 9th Apr 2024
M104 - The Sombrero Galaxy. Distance: 31 Million Light Years
Starwatch - April 2024 - Mon 8th Apr 2024
Published 9th Apr 2024
Some of the brightest stars in the whole sky can be seen during these crisp autumn evenings.
Starwatch - March 2024 - Wed 6th Mar 2024
Published 6th Mar 2024
What a wonderful time of the year this is to be observing the night sky. The weather is warm, the nights clear, and the Milky Way shines directly overhead!
Object of the Month - Mon 4th Mar 2024
Published 4th Mar 2024
Eta Carinae Nebula (NGC 3372)
Distance: 7500 Light Years
Right Ascension: 10 : 43.8 | Declination: -59 : 52
Some of the brightest stars in the whole sky can be seen during these crisp autumn evenings.
As red Betelgeuse and blue Rigel set with Orion, the Hunter in the west; fiery red Antares rises in the east.
For me, I don't think there are any other constellations in the sky that herald the coming of the seasons so
well as these two do. Orion in the east, signals summer is around the corner, whilst Scorpius in the east, brings the chill winds of winter with it.
Over in the northeast another star shines. This is Arcturus, in the constellation Bootes, the herdsman. It's an orange-giant star, and it's unusually old as naked-eye stars go: about 10 billion years — roughly twice the age of the Sun, Earth, and solar system. Arcturus may thus be the oldest object you've ever seen.
Arcturus is the third-brightest star in Earth's night sky. It appears so bright for a couple of reasons. First, Arcturus really is a bright star; it produces more visible light than most stars. If
you placed Arcturus side by side with our own star, the Sun, it would appear more than a hundred times brighter. And second, Arcturus is fairly close to us, at a distance of just 37 lightyears.
This nearness has another effect on how we see Arcturus: It moves across the sky faster than almost any other star. All
stars are in constant motion as they orbit the centre of our Milky Way galaxy. But they're so far away that their motion is imperceptible on human timescales. Astronomers must use sensitive instruments to measure this motion.
Arcturus is moving toward the constellation Virgo, which is higher in the sky above Arcturus, at about half a degree every millennium — a distance equal to the width of the full Moon.
Arcturus will move out of Bootes and into Virgo in about 20,000 years.