The five brightest planets – Mercury, Venus, Mars, Jupiter and Saturn – have been known since ancient times and can easily be seen with the naked eye if one knows when and where to look. They are visible for much of the year, except for short periods of time when they are too close to the Sun to observe.

Planets Visible in Sydney

Venus

Venus, the sky’s brightest planet, has a conjunction with the bright star Regulus – Heart of the Lion in the constellation Leo – on July 21, 2021.

PSR B12620-26 b The exoplanet known as PSR B12620-26 b is the oldest known planet in the universe, with an estimated age of about 13 billion years.

However, because it orbits relatively close to the sun, it’s only ever visible for a short time after sunset or before sunrise. It’s actually been visible after sunset since November, and it will sink behind the sun in June.

It seems we should see Venus through all the night because Venus is inner planet. The further in the planet is, the closer to Sun (in the sky) it is. There is a maximum angle between the Sun and the planet in the sky and that happens when the planet subtends a right angle between Earth and the Sun.

Look in the right part of the sky.

1. Mercury: Mercury will be visible near the Sun.
2. Mars: look low in the morning sky, Mars moves eastward.
3. Jupiter: Jupiter is always located very far away from the sun.
4. Saturn: look low in the Libra constellation to see this bright planet.

Ultimately, as Venus prepares to pass between the Earth and the sun, it appears as a thinning crescent. Still on the far side of the sun, at a distance of 136 million miles (219 million kilometers) from Earth, it appears a small, almost full silvery disk.

To date, no definitive proof has been found of past or present life on Venus. With extreme surface temperatures reaching nearly 735 K (462 °C; 863 °F) and an atmospheric pressure 90 times that of Earth, the conditions on Venus make water-based life as we know it unlikely on the surface of the planet.

Neptune’s lack of Oxygen No other planet has this, including Neptune, which only has trace amounts of oxygen. It has a hydrogen, helium and methane atmosphere. So, it would be impossible for us to breath on the planet Neptune, which is another obstacle for humans living there.

Deep within Neptune and Uranus, it rains diamonds—or so astronomers and physicists have suspected for nearly 40 years. The outer planets of our Solar System are hard to study, however. Beyond the lingering mystery of the diamond rain, there’s a big loss in our failure to study Uranus and Neptune inside and out.

Neptune, like the other gas giants in our solar system, doesn’t have much of a solid surface to live on. But the planet’s largest moon, Triton, could make an interesting place to set up a space colony.