I've been wondering something. My question is, if someone wanted to launch an object into space - how feasible will it be from a physical perspective, what the challenges of this will be and whether it can be done on a reasonable budget. Note that when I say into space I mean space, not just the troposphere which can be done with a helium filled balloon. I mean to have it escape the earth's pull such that it can venture towards another celestial body or into a particular direction. The object in this case would be extremely small compared to the rockets launched by NASA. Maximum weight for the object to be sent would be about 5kg or less - that will make up the technological equipment, to do the 'monitoring' and transmit back the results. As unfeasible as this sounds to me I just wanted to ask because I am hoping that maybe it's not impossible even if someone doesn't have a huge budget like one of these space companies.