@Detsella Morningdew  
You’re welcome! Nice to see something good come of my physics-posting, heh.
 
I want to addendum that two big reasons relativistic mass has fallen out of favor are:  

@Cirrus Light  
Thanks! I knew this, but I’ve never seen it explained in a way this easy to understand. This way of teaching it is something I can use for explaining it to others that normally would be intimidated by it.

Pretty.
 
Also she should totes hang out with
 

Nebula born Dash.

@VS  
You mean your posting avatar? Click the drop-down menu at the very top right side of the site layout and select Account; should be clear enough what to do from there. You may want to crop this image, though, I don’t imagine the full-size version would look like much after being compressed down to avatar size.

How do I change my icon?

@Nittany Discord  
it’s the great space dashie, get on board!  
on the great space dashie, we’ll explore!

Space Dash!

@Background Pony #336C  
Lol. I love it.
 
Be careful, though, I may be misleading you -
 
τ = t * Sqrt( 1 – β ² )
 
I sometimes swap t and τ. I checked here, but I’m still not totally certain I got it right.
 
Also, to clear up something - you always appear normal to yourself, it’s just that you move in slow motion to others, hence the slower acceleration I mentioned.
 
To you, length contraction would cause the universe to shrink along your direction of travel as you approach the speed of light, which is how you answer the time discrepancy.
 
It’s weird but it works, due to how time and space are related (and that’s why it’s called spacetime - their close relationship. There’s more to it but that’s it in a nutshell).

@Cirrus Light  
When comments sections can help you in college, lol

Dash, try an Alcubierre Drive.

Wheeeeeeeee!!! :D

Golden Sun’s Meteor summon never looked this good.

Colorful pone in a colorful image.

@Cirrus Light  

That’s one way to save the world from an oncoming meteor.

Different authors approach the light barrier in different ways.
 
Relativistic kinetic energy is
 
E = ( γ - 1 )mc
 
where
 
γ = ( 1 - β ² ) ^-1/2
 
and β = v / c
 
This approaches infinity as you approach the speed of light. Thus, it would take infinite energy to accelerate something to the speed of light, though with an arbitrary amount of energy, you may get arbitrary close.
 
Two other approaches used work in roughly the same way; relativistic mass is somewhat misleading, so has fallen out of favor to a time dilation approach.
 
If you take the classical F = ma => a = F/m, and realize that F = dp/dt, where p is classical momentum, and make a relativistic correction of using proper time τ in place of coordinate time t, where the two have the relation
 
τ = t * Sqrt( 1 - β ² )
 
you find that F = dp/dt * Sqrt (1 - β ² ), which means that as you approach the speed of light ( β -> 1 ), your increase in momentum would approach infinity in order to increase your speed.
 

 
Practically, I think of it this way; time dilation means you move in “slow motion” to others. If you’re moving in slow motion, you don’t accelerate as quickly - you fire off the rocket engines, but because they fire in slow motion, it takes longer for your speed to increase by some increment dv. This has such a behavior that it would take an infinite acceleration to reach the speed of light.
 
In other terms, still, your momentum increases, so you have to push harder to accelerate the same bit, to where you’d have to push infinitely hard to cross the last bit of speed to reach the speed of light.
 

 
There’s a lot of ways to think of it - and all of the ways I’ve mentioned are valid, and experimentally confirmed in particle accelerators :q

@Harmozel  
Dormammu, I’ve come to bargain!

Heaven knows what she’s planning on doing once she reaches the speed of light.  

So is this what Austraeoh will become?

I quite like this one. The colours are wonderful

Now this is good. I can really appreciate this art.

Awesome

@Bexar Bandito  
dormammu, i’ve come to bargain!