Sometimes. Mercury is generally too close to the Sun to be visible, but for a couple of weeks every couple of months, it is far enough away - to be visible either right before sunrise or right after sunset.
I recommend the open-source Stellarium planetarium program to know when it will be visible.
Today is Sunday, September 7, 2014. Tonight, Mercury may be visible low on the horizon just a little south of west immediately after the Sun sets.
The Great Red Spot on Jupiter is not visible to the naked eye from Earth. It requires a telescope to be seen clearly, as it is a massive storm located in Jupiter's atmosphere. While Jupiter itself can be seen without a telescope, the details of the Great Red Spot and other features become discernible only through telescopic observation.
Mercury is usually hard to see without a telescope because it orbits close to the sun, which means it is only visible shortly after sunset or before sunrise when the sun's brightness doesn't drown it out. Additionally, its small size and proximity to the sun make it appear close to the horizon, where atmospheric distortion can make it harder to spot with the naked eye.
The Earth is definitely the #1 easiest. Next in line would be Mercury, Venus, Mars, Jupiter, and Saturn. Each of those is visible without a telescope, so you'd know exactly where to point your telescope by seeing the planet with your eye first. The brightest planet that you do need a telescope to see is Uranus. So you definitely won't miss it when you're pointed at it, but you need to know where to point.
The Earth is definitely the #1 easiest. Next in line would be Venus, Mars, Jupiter, Saturn, and Mercury. Each of those is visible without a telescope, so you'd know exactly where to point your telescope by seeing the planet with your eye first. The brightest planet that you do need a telescope to see is Uranus. So you definitely won't miss it when you're pointed at it, but you need to know where to point.
The Earth is definitely the #1 easiest. Next in line would be Venus, Mars, Jupiter, Saturn, and Mercury. Each of those is visible without a telescope, so you'd know exactly where to point your telescope by seeing the planet with your eye first. The brightest planet that you do need a telescope to see is Uranus. So you definitely won't miss it when you're pointed at it, but you need to know where to point.
Yes, a dark spot has been observed on Uranus. It was first observed in 2006 by both the Hubble Telescope and the Keck Telescope.
through a telescope or binoculars
uranus
Well, imagine Mercury as a tiny, elusive bird flitting too close to the bright sun so we can't see it clearly. Because this closest planet to the sun likes staying close to its fiery friend, it's hide-and-seek game with us results in Mercury being usually tough to spot without help from a kind telescope. But don't worry, even the smallest moments of it peeking through the depths of space can bring a big spark of joy to our hearts.
When they blow off you can spot them with a telescope.
You can discover a comet at home using a telescope. Look at or take pictures of the night sky. If you see a spot of light that has changed relative position from one night to another (or one week to another...) then this might be a comet.
That is the planet Jupiter. The black spot was created recently when a asteroid collided with it. Jupiter has a Great Red Spot created through storms. No planet has a black spot no mars has a giant red spot and mercury has the black spot