From a long way off, both Earth and Jupiter crossed in front of the Sun on January 10, 2026 This is how extraterrestrials could have detected both planets, just as the Transiting Exoplanet Survey Satellite has since 2018 and as the Kepler space telescope did from 2009 to 2018. Aliens in star systems from only a narrow strip near our ecliptic could have seen this.
Can you align the orbits so you can see both Earth and Jupiter crossing the Sun?
Spin and tilt this to put Jupiter and Earth in front of the Sun, Zoom in for detail.