  Time-series transit photometry from the Kepler space telescope has allowed
for the discovery of thousands of exoplanets. We explore the potential of yet
improved future missions such as PLATO 2.0 in detecting solar system analogues.
We use real-world solar data and end-to-end simulations to explore the stellar
and instrumental noise properties. By injecting and retrieving planets, rings
and moons of our own solar system, we show that the discovery of Venus- and
Earth-analogues transiting G-dwarfs like our Sun is feasible at high S/N after
collecting 6yrs of data, but Mars and Mercury will be difficult to detect due
to stellar noise. In the best cases, Saturn's rings and Jupiter's moons will be
detectable even in single transit observations. Through the high number (>1 bn)
of observed stars by PLATO 2.0, it will become possible to detect thousands of
single-transit events by cold gas giants, analogue to our Jupiter, Saturn,
Uranus and Neptune. Our own solar system aside, we also show, through signal
injection and retrieval, that PLATO 2.0-class photometry will allow for the
secure detection of exomoons transiting quiet M-dwarfs. This is the first study
analyzing in-depth the potential of future missions, and the ultimate limits of
photometry, using realistic case examples.
