# Could the Sun's magnetosphere block extraterrestrial contact?

I was reading how certain strong magnetic fields can block or alter radio waves so bearing this in mind would it be possible for the Sun's magnetosphere to block attempts to establish radio contact from other solar systems if the signal is weak enough?

• This isn't entirely accurate. The sun is very loud in several ranges of the electromagnetic spectrum, including radio. In fact, when the STEREO spacecraft went behind the sun, they needed to very carefully plan for the reappearance so that the antenna weren't pointed at the sun. If they were, then the spacecraft would never see the Earth. The spacecraft orbiting at $L_{1}$ also avoid the Earth-sun line so that DSN can actually see them... – honeste_vivere Aug 18 '16 at 12:32