Which planets can be seen with the naked eye from Earth? For much of the year, Mercury, Venus, Mars, Jupiter, and Saturn are visible. Neptune and Uranus are not visible, and the eighth planet in our solar system is, of course, Earth. During this time, Mars, Mercury, and Venus can be seen at dawn or dusk. Jupiter and Saturn can be found during twilight.
From mid-November to early January, the Moon is visible after sunset every night. In addition, Pluto is visible now as it moves away from the Sun. From mid-April to late October, the evening star, Venus, can be found just before sunrise. From late April to late May and on August 21st, the sun rises due east and sets due west over the Pacific Ocean where it can be seen from California to Australia. The center of our galaxy is located within our own Milky Way Galaxy but outside our Solar System. It contains hundreds of billions of stars, including the star that gives off our galaxy's energy: the Milky Way Galaxy itself contains at least 100 billion galaxies each containing many stars and planets.
The universe is vast and incredibly old. Scientists think that it may have started with a single atom over 13.8 billion years ago. Since then it has expanded and evolved into what it today, containing millions of galaxies spread across infinite space. The future survival of humanity is an issue for debate among scientists, but some predict that we will become extinct within this lifetime.
Mars, Mercury, and Venus can be visible at dawn and dusk during this period. The planets Jupiter and Saturn may be seen in the early morning sky. They'll appear low in the east before rising as you get closer to southern California.
From November through February, the only planet that can be seen with the unaided eye is Venus. It's the brightest object in the night sky after the moon and it can sometimes be seen even when the sun is out. During these months, the other planets can be seen using a telescope.
From March through October, Mars is the highest object in the western sky just after sunset and just before sunrise. It can be seen for several hours each day, but it's usually best in the morning when it's more distant from the earth than it will be at its closest approach in about 2600.'Tis the red planet we all learned about in school. It has been said that if you see Mars alone in the night sky, then someone else on Earth sees you too!
Jupiter is the king of the planets and one of the most beautiful objects in the night sky. It's easy to spot because it's the largest object in the sky after the moon and it always shows up near the constellation Virgo.
Mercury, Venus, Mars, Jupiter, and Saturn, the five brightest planets, have been recognized since ancient times and may be viewed with the naked eye provided one knows when and where to look. They are visible for the most of the year, except for brief intervals when they are too close to the sun to be seen.
Over time, other planets have been discovered using telescopes, some of which are still improving on the vision of the unaided eye. Today, astronomers know of eight planets beyond Earth's orbit that can be seen with the unaided eye, though not all of them are visible at once.
The first four planets listed here were also the only ones known early on in scientific history. Today, many more planets have been discovered through planet hunting programs like NASA's Kepler mission, which has found thousands of candidates for additional Earth-sized planets located within their star's habitable zones.
A new planet was recently announced by researchers at MIT who used the Hubble Space Telescope to find a large gaseous planet orbiting a small star known as HR 8799. This makes it the first gas giant found outside our solar system. In addition, several smaller planets have been detected around HR 8799 using both radial velocity measurements and transits. The presence of these other worlds was confirmed by observing changes in the brightness of HR 8799 as they passed in front of their parent star from our perspective on Earth.
All of the other planets are visible in the same way as they are on Earth, except they are a little less luminous at opposition. The zodiacal light is most likely more visible than it is from Earth. It's hard to say how much brighter Venus or Mars would be if they were closer to us.
Earth isn't particularly bright compared to other stars, but it does have one significant advantage over them: it doesn't go through a day. So regardless of where it is in its orbit around the Sun, Earth experiences 24 hours of daylight and 12 hours of darkness every day. Other planets don't have this luxury; when they are on the opposite side of their parent star from Earth, they are always dark. When they are near aphelion (the point in their orbits furthest from the Sun) they are also near perihelion (the point in their orbits closest to the Sun), but because they are blazing hot outside their atmospheres, anything on their surfaces will have been evaporated or burned away long before now.
Even though Earth isn't very bright, there are several things which do make a difference. The first is that it has cloud cover which blocks out much of the sunlight that reaches it. Since clouds are white, they reflect some of the sunlight back into space, so without these clouds our planet would be even brighter than it already is.