It might well be possible: if the mantle and the crust of a planet have been blown off, then only the core would remain.
The closest thing in our solar system would be Mercury (70% metal).
Good luck, commander!
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Thanks cmdr,
I found 2 polonium within half hour of landing, I thought I hit the jackpot until I spent another 2 hours looking for more without success. Found plenty of tin and tungsten though, about 15 each, could'nt carry any more so I had to abandon a few. The Polonium came from a mesorite, on the rim near a 'roid crater.
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Does the local Air Traffic Control play Iron Maiden and Judas Priest on repeat? 
Brett C
Frontier
Does the local Air Traffic Control play Iron Maiden and Judas Priest on repeat?
You never know until you visit the 813C temperature planet!
Hmm... it says "Silicate Vapour Geysers"... how can that be when it's 100% metal?
It's a rounding error, more like 9,9999999999999999999999999999999999999% metal...
Entirely possible in fact given the general planet formation there should be several hundred in our galaxy alone. Let's say it forms close to the star all the lighter non metal gasses are hence either burnt away or go into the atmosphere. Likely is the word, if not common.
You only need to look at our planet and say what if we were as close or closer than mercury to say, yep probably be mostly metal. Iron is common because it is stable, as would gold be for the same reason, although rarer, obviously because of it's atomic make up.
Some stars are nothing but a mass of spinning iron with a few other elements, being the children of multiple heavy metal deaths of stars. Over time it should be entirely possible for a heavy metal star which is mostly metal, which is surrounded by nothing but 100% metal planets to form. It is extremely unlikely but given there are 4 quadrillion (400000000000000000000000) estimated stars in the visible universe, and the universe is ~ 13.82 billion years old, it should have already happened probability speaking.
I so want to make a joke about Motorhead but meh.
You only need to look at our planet and say what if we were as close or closer than mercury to say, yep probably be mostly metal. Iron is common because it is stable, as would gold be for the same reason, although rarer, obviously because of it's atomic make up.
Some stars are nothing but a mass of spinning iron with a few other elements, being the children of multiple heavy metal deaths of stars. Over time it should be entirely possible for a heavy metal star which is mostly metal, which is surrounded by nothing but 100% metal planets to form. It is extremely unlikely but given there are 4 quadrillion (400000000000000000000000) estimated stars in the visible universe, and the universe is ~ 13.82 billion years old, it should have already happened probability speaking.
I so want to make a joke about Motorhead but meh.
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Must be a really dense planet.
Depends on the metal and of course whether its core is molten, would be much less dense than ours if it was mostly aluminium even if solid.
Mind you Earths core and mantle is mostly iron with a shed load of radioactive molten metals and a few other less rare metals tossed in.
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Some fragments come from extra-planetary sources