Mercurian adj.

Jules Verne can make a visit to a planet an exciting affair enough, but our Mercurian friend here presented, leaves Jules Verne's powers of description far behind.

The Mercurian ship rose to an elevation of a hundred feet, drifting gently over the city.

You know he’s perfectly adapted to a Mercurian environment. Heat doesn’t mean anything to him, and he’s built for the light gravity and the broken ground.

‘Where else have you been?’ asked D’Angeur. ‘Oh, a great many places. The Mercurian Hell, for one. It’s really not a bad place. Most interesting.’

But I have to get my own collection, trading from other boys, the Martian rocks and Mercurian sands which filled my room, but about which Dad would never comment.

The freezing lichen forests of the Martian polar caps or the raging dust rivers at the red planet's equator; or Mercurian night versus Mercurian day—these he had experienced only through psychorama travelogs.

For Kepler’s benefit, deSilva ordered the entire base reduced to Mercurian gravity.

Dear Mr. Resnick: What is so newsworthy about President Meacham having an affair with a Neptunian? My own wife is an egg-laying seven[-]limbed Mercurian porble, and I take extreme umbrage at your pedestrian notion that there is something unsavory about inter[-]species romance.

The diminutive Mercurian waiter, who was used to him, paid him no attention as he brought Scorpio a drink and continued making his round of the tables.