Transcription
If you travel close to the speed of light, so if you had a spacecraft traveling close to the speed of light, according to laws of physics, you can shrink the distance to the Andromeda galaxy and therefore the time it takes to get there.
Closer you get to speed of light, the more you can shrink it. And so you can make those 2 million lighty years. You could traverse across that distance in principle in a minute according to physics.
However, the downside is that you couldn't come back. If you came back to the Earth at that speed to tell everybody what you'd found, at least 4 million years would have passed on the Earth. We could in principle explore the galaxy and beyond, but getting in to chat to everybody about what you found is forbidden.