system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: How many earth-like planets can aliens see in our solar system using our technology?

For example if Aliens lived on a planet around Alpha Centauri, how much would they be able to tell about our planets?

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Would they think the probability of life on earth and mars (and venus) are pretty much the same?

Or would they say that mars is "probably" just a rock and earth has water and atmosphere? How many of our planets could they detect? Pluto <3 ?

Could they detect any of our signals (like radio) and know that there must be life?


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Edit: Assuming human-like aliens, no livin gas monsters

Edit: Thank you guys!
gpt
On one hand, they would probably have trouble seeing Earth, since we have several gas giants on the outer edge of our solar system; most Human technologies for detecting planets has to do with gravity's effects, and having large gas giants can obscure the smaller gravity wells of the inner planets.

But, if we were a human-like alien, on an Earth-like planet, with Earth-like technologies looking at Earth's solar system from light-years away, and weren't put off by Jupiter and Saturn, they would see three earth-like planets in the habitable zone: Mars, Earth, and Venus.  There's a slight possibility that their math may be inconclusive and detect a 4th planet just inside Jupiter's orbit or mis-measure Mars' size and orbit, due to the asteroid belt, but the asteroid belt doesn't have much mass (less than the moon) so it might not be an issue.