A very simple series of step definitions with duplication I want to remove...

steps_and_objects.rb

# encoding: utf-8
begin require 'rspec/expectations'; rescue LoadError; require 'spec/expectations'; end 
require 'cucumber/formatter/unicode'


Given /^a rocket exists$/ do
	@rocket = Rocket.new
end

When /^the rocket is launched$/ do
	@rocket.launch
end

Then /^the rocket is on the moon!$/ do
	@rocket.location.should == "moon"
end

Given /^a person exists$/ do
    @person = Person.new
end

When /^the person enters the rocket$/ do
	@person.enter(@rocket)
end

Then /^the passenger is on the moon!$/ do
	@person.location.should == "moon"
end


class EarthBasedObject
	def initialize
		@location = "earth"
	end
	def location
		@location
	end
end
class Rocket < EarthBasedObject

	def launch
		@location = "moon"
	end	
end



class Person < EarthBasedObject
	def enter(object)
		@object = object
	
	end
	
	def location
		if(@object) 
			@object.location
		else 
			super.location
		end
	end
	
end

visit_the_moon.feature

Feature: Visit The Moon
    In order to experience space travel
    As a nerd
    I want to visit the moon

Scenario: Launching The Rocket
  Given a rocket exists
  When the rocket is launched
  Then the rocket is on the moon!
  
Scenario: Rocket has a passenger
  Given a rocket exists
	And a person exists
  When the person enters the rocket
	And the rocket is launched
  Then the passenger is on the moon!