Pressure = increase in gravity = increase in time.
A prior post by some other anon stated satellite in orbit has more time than one on Earth, because it goes faster. It actually has less. Reaching the same point quicker = because of less density of time.
Increase in gravity = increase in dimensions (no mass nearby = no "gravity" = little to no "time" = "flat" . With addition of gravity = dimensions, "elliptical" 3D / 4D (w/time).

Sun has a ton of gravity/time. Remember traveling along dimensions greater than 3/4?
Jupiter has a ton of gravity/time, so much so that it almost became a sun, itself, but failed to do so.
If Jupiter combined with Saturn, it would form a new sun. The morning star will be lit.
As far as travel, how much mass is enough?
Do you think we sent satellites/probes into the sun to "burn up?"

How close is the closest star?
How close is the next closest?
How do YOU measure distance?