Say I put you in a box, and then put that box out in a void. (But this time I don't need to have you in a true void. I just want you to be well away from any pull. You can have a star or two, or as many as you like, as long as you keep them far off. Okay?) Now, say I tied a rope from the box to a ship, and then I got in that ship and sent it up, so that it went fast, and more fast, and more fast... I just burn up fuel as long as I have any left. As long as I see to it that you get sped up all the time, and at the same rate, you will feel a pull that will feel just like the pull you'd feel if you were back here, at home. If you have a ball of lead and a ball of wood in that box with you, you can drop them and they will both land at the same time. That is a bit odd, no? Puts a bug in your ear, yes? You can bet it put bugs in our ears. But no one had come up with a good way to say why that was so. Not yet.🏁

Say I put you in a box, and then put that box out in a void. (But this time I don't need to have you in a true void. I just want you to be well away from any pull. You can have a star or two, or as many as you like, as long as you keep them far off. Okay?) Now, say I tied a rope from the box to a ship, and then I got in that ship and sent it up, so that it went fast, and more fast, and more fast... I just burn up fuel as long as I have any left. As long as I see to it that you get sped up all the time, and at the same rate, you will feel a pull that will feel just like the pull you'd feel if you were back here, at home. If you have a ball of lead and a ball of wood in that box with you, you can drop them and they will both land at the same time. That is a bit odd, no? Puts a bug in your ear, yes? You can bet it put bugs in our ears. But no one had come up with a good way to say why that was so. Not yet.🏁