The planetary parade will likely only be visible until December 31 as Mercury rapidly fades.
Becky Smethurst tells Newsweek a black hole is a couch cushion, "not pulling anything towards them. But if you lose something down the side, it's gone forever."
In an influential report known as the decadal survey, planetary scientists have said visiting Uranus should be a priority for NASA.
In a double treat for skywatchers on Thursday, the Orionids peak in the morning, while Uranus will be seen in the evening in the light of a full moon.
A full moon on Halloween occurs approximately every 19 years, with the feat last happening in 2001.
On October 31, Uranus will be at its closest point to Earth.
Neptune and Uranus could have thin exterior shells of liquid water and thick interior mantles of superionic ice water.
Huge collisions have huge consequences.
Uranus is pretty strange. Especially its magnetosphere.