Because all previous attempts of interstellar travel have been unsuccessful, we must resort to the yolo-style epic tesseract of swag. Using said tesseract, we can finally break the sound barrier in space. However, because said sound barrier is nonexistent in space, we must break other barriers, such as the language barrier.
The language barrier has long existed in space, particularly strong in the Smug-Korean genre. Smug-Korean is an Asian variant of Korean, most notably derived from space aliens. Aliens landed in Korean about a century ago, introducing KPop, makeup, and plastic surgery. The current closest country to breaking the language barrier is South Korea, which is already 85% to the point of learning Smug-Korean. Back to the sound barrier--once Smug-Korean is achieved on Earth, the sound-swag barrier will be broken, resulting in a rift in the space-swag continuity.
Do you hear the sound of the barrier breaking? No, because it is in space. However, after Smug-Korean is learned in space, the laws of BS will take precedence over the laws of physics, allowing sound to travel in space, unicorns to poop rainbows, and hunter's horns to catch dragon mice. With these new-found abilities, the swag-yolo law of -√-1 will arise, causing the very ground to shake, even when Calvin is not around.
Onto the process now. What is the space-swag continuum? Well, first, let's discuss swag. What is swag, and how is it fueled? Scientists, after extensive research and teenage experiments, have finally found out the truth: swag is equal to how much money your mother gives you every month. To fuel swag, your mom has to give you large amounts of money to show off to your friends, therefore making you "cool." But who is the mother of space? Turns out, the mother of space is swag itself, and swag definitely has the right to be cool. By breaking the sound barrier with obnoxious yolos, swag mama is forced to turn on sound in order to speak swag-yolo.
After gaining this knowledge, we can now apply this to real life. in the 5th verse of the 10th paragraph of the BS penal code, the space-swag continuum can be broken by the sound barrier merging with the swag-yolo barrier known as language. This can only be achieved by having a temperature of -1 kelvin, which is only possible by using the yolo-style epic tesseract of swag. As you can see, interstellar travel can only be achieved by breaking the space-swag continuum with the yolo-style epic tesseract of swag.