Next time you see the Big Dipper out of the corner of your eye, take a look at the star in the middle of the handle. If you have decent eyesight, you may see not one, but two stars: a brighter star known as Mizar, and a fainter star called Alcor.
"BORING!" said the 5-year-old of the little blue dot appearing through the telescope…
Perhaps at first glance, but considering that Neptune, the 8th planet, is 30 times farther from the Sun than Earth, it’s actually an amazing sight. At approximately 2.8 billion miles away, it cannot be observed with the un-aided eye. Seeing the disk and color requires a moderately sized telescope, and a keen-eyed astronomy buff.
We learn in grade school that the Moon, our nearest neighbor in space, causes tides on the Earth’s oceans. It does so through its gravitational attraction to the Earth. But the gravitation interplay between Earth and Moon has other, subtler effects as well.