Which statement is true about scientific breakthroughs in Mars explorations? options: 1) They have made space exploration easier because advanced magnetometers are able to send back data to Earth. 2) They have made space exploration easier because advanced space probes have proved that the sun is the only star that has planets. 3) They have a positive impact because the high-gain antenna has been able to measure the magnetic fields produced by astronomical bodies. 4) They have a positive impact because wireless technology devised for Mars exploration can be used to improve communication systems on Earth.