Lexi Webster
Jupiter, the largest planet in our solar system, is usually visible from Australia. On September 26, 2022, Jupiter made its closest pass to Earth in 59 years, and stargazers were treated to excellent views of the gas giant, which appeared unusually bright and large in the sky. While this was a rare occurrence, Jupiter is usually visible to the naked eye, and you can find it by looking for a bright star low on the horizon just after sunset in a dark area with high elevation. You can also use binoculars or a telescope to get a better view of Jupiter and its four Galilean moons.
| Characteristics | Values |
|---|---|
| Jupiter's visibility in Australia | Visible in April 2018, July 2023, and October 2022 |
| Best viewing time | Early morning |
| Best viewing month | July |
| Best viewing location | Anywhere, including light-polluted cities |
| Best viewing direction | East |
| Best viewing time on the East Coast of Australia | 7 pm |
| Other visible planets | Venus, Saturn, Uranus, Neptune |
| Other visible astronomical phenomena | Sagittarius constellation, the Milky Way, Jupiter Triangle |
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What You'll Learn
Jupiter's visibility in Australia
Jupiter is usually visible in Australia, but its visibility depends on the lighting conditions and the time of year. For example, on 26 September 2022, Jupiter made its closest pass to Earth in 59 years, making it unusually bright and large in the sky. It was visible to the naked eye, and four of its 80 moons could also be seen. However, Jupiter is usually hard or impossible to see because it is very close to the Sun in the sky, only about 3 degrees away.
To see Jupiter, it is best to go outside just after sunset to a dark area with high elevation. You will be able to see it with your naked eyes, appearing as a bright star low on the horizon in the east. If you have a telescope, you can use it to see Jupiter's four Galilean moons. If you don't have a telescope, binoculars will also give you a great view. If you don't have either, you may have to wait a few hours until Jupiter rises further up the night sky and away from any buildings or trees in your line of sight.
There are online resources that can help you find Jupiter in the sky. For example, TheSkyLive provides a star map and a detailed schedule of all the Solar System objects visible from Sydney, Australia. Similarly, www.stellarium.org can show you exactly where Jupiter is in the sky.
Jupiter is a large gas planet, made up of 90% hydrogen. Its size helps protect the Earth from comets and asteroids that get pulled towards the Sun.
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The Jupiter Triangle
On 26 September 2022, Jupiter made its closest pass to Earth in 59 years. The solar system's largest planet was unusually bright and large in the sky, visible to the naked eye from Australia. Four of its 80 moons were also visible. Jupiter won't be this close again until 7 October 2129.
To spot Jupiter, stargazers should head outside just after sunset. A dark area with high elevation is best. You will be able to see what appears to be a bright star, low on the horizon, rising in the east. If you have binoculars or a telescope, you will be able to see Jupiter in greater detail, and four tiny stars near it, which are actually its Galilean moons. If you have buildings or trees in the way, wait a few hours until Jupiter moves further up the night sky.
The further you are from city lights, the better your view of the sky will be. There are several websites that can help you locate Jupiter in the sky, including TheSkyLive, which provides an all-sky chart and a list of objects that are updated in real time to reflect what's currently visible above the horizon. Time and Date also provides information on the visible planets in Sydney, Australia.
In July, the Milky Way galaxy is particularly visible from Australia. This is because Earth reaches aphelion on 3 July, the point in its orbit where it is furthest from the Sun. However, most of the temperature difference between summer and winter is caused by the tilt of the Earth.
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Jupiter's Galilean Moons
Jupiter has at least 95 known moons, but its four largest moons, known as the Galilean moons, are the most well-known and fascinating. The Galilean moons are Io, Europa, Ganymede, and Callisto, named after the Italian astronomer Galileo Galilei, who first observed them in 1610. They are the closest large moons to Earth and are easily visible through a small telescope or binoculars.
Ganymede is the largest of the Galilean moons and the largest moon in the Solar System, surpassing Mercury in size, though not mass. It is the only moon with its own magnetic field and, like Europa, has a thick outer layer of ice. Callisto is only slightly smaller than Mercury, and Io and Europa are about the same size as Earth's moon.
Io is the innermost and third-largest of the Galilean moons. It is the only rocky moon other than Earth's moon that is large enough to be spherical. It is also the most volcanically active body in the Solar System, with constant eruptions across its surface. This volcanic activity is due to its location orbiting close to Jupiter and its neighbouring large moons.
Europa is a target in the search for life beyond Earth. It is believed to be habitable, and two missions, NASA's Europa Clipper and the European Space Agency's Jupiter Icy Moons Explorer (JUICE), will study it in the coming years.
The discovery of the Galilean moons was significant in the history of science as it disproved the theory of geocentrism, which stated that all objects in the cosmos orbited the Earth. They were the first moons discovered to orbit a planet other than Earth.
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Best time to see Jupiter
Jupiter is the largest planet in the solar system and a gas giant. On rare occasions, Jupiter comes very close to Earth. On September 26, 2022, Jupiter made its closest pass to Earth in 59 years. It won't be this close again until October 7, 2129. During such close passes, the planet is visible to the naked eye and appears unusually bright and large in the sky. Four of its 80 moons are also visible.
To see Jupiter at other times, the best time to look is just after sunset in a dark area with high elevation. You will see what appears to be a bright star low on the horizon rising in the east. If you have a telescope, you can use it to see Jupiter's four Galilean moons. If you don't have a telescope, binoculars will also give you a great view. If you don't have either, you can still see Jupiter with your naked eyes. If you have buildings or trees in the way, you'll have to wait a few hours until Jupiter moves further up the night sky.
Jupiter is usually difficult or impossible to see because it is very close to the Sun in the sky, only about 3 degrees away. This means that it is often obscured by the Sun's glare. However, during its close pass to Earth in September 2022, Jupiter was visible to the naked eye for about a month.
In July, Jupiter and Venus can be seen together in the morning sky.
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Jupiter's visibility in Sydney
Jupiter is visible in Sydney, Australia, but its visibility depends on various factors, including the time of day, the time of year, and light pollution.
In April 2018, Jupiter was very prominent in the Australian night sky, and could be seen from almost anywhere, including light-polluted cities. It could be spotted by looking to the East from about 7 pm on the East Coast of Australia. The triangle formation was best viewed throughout April.
However, Jupiter is usually very close to the Sun in the sky, only about 3 degrees away, so it can be difficult or impossible to see. It is best to look just after sunset, when visibility improves as the sunlight fades. The further you are from city lights, the better your view of the sky will be.
There are interactive night sky maps available online that can help you find Jupiter in the sky above Sydney. These maps are updated in real time to show what is currently visible above the horizon. You can also find star maps and planetarium tools online to help you locate Jupiter and other celestial bodies.
In July, Jupiter and Venus can be seen in the morning sky.
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Frequently asked questions
Jupiter can be seen from almost anywhere in Australia, including light-polluted cities. Look to the East from about 7 pm on the East Coast of Australia.
Jupiter is bigger and brighter in our skies when it is closer to Earth. In 2022, it was closer to Earth than it had been in decades. Jupiter is just 3 degrees from the Sun in the sky, so it can be difficult or impossible to see. Jupiter can be seen for more than 7 hours during the late night and early morning until sunrise.
There are several online resources that can help you find out what the sky looks like from Australia tonight. TheSkyLive.com provides a star map and a detailed schedule of all the Solar System objects visible tonight from Australia. Scitech.org.au provides monthly updates on the amazing things you can find in the night sky from Western Australia.
In addition to planets like Jupiter, Venus, Mars, Saturn, Uranus, and Neptune, you can see stars, constellations, and comets from Australia. The Milky Way stretches across the Australian sky in July, and the further you are from city lights, the better your view of the sky will be.
