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To observe the planets, you do not need a telescope greater than 4 -inches in diameter. A suitable pair of binoculars (in the range of 7 X 50 to 10 X 50) will be enough. These are great choices ...
All seven of the other planets in our solar system are about to become visible at once in a great planetary alignment – here’s how to spot the celestial show. Close. Advertisement.
Objects need to be at least 400 km or so in size to round out via self-gravity, and there’s still lots of room for large numbers of them to lurk undiscovered in the darkness beyond Neptune.
The chances are worse for all eight planets aligning within 1 degree of sky. According to Meeus, "this will occur, on average, every 13.4 trillion years," Barkhouse said. In comparison, the ...