Hopefully any inhabitants on said planet are having the same conversation having seen a much smaller planet in the habitable zone around our sun and they too are preparing to launch a probe.
alternatively they already knew about us, and have sent the probe
alternatively still, the know about us and have other pressing matters to deal with or are just ignoring us because we pose no threat.
They missed out planet or ignored it as being no threat, AND missed the probe we sent until one day (in the future) it crashes down on their world killing one of their leaders, and a now enraged planet with inhabitants at minimum 5 times bigger/stronger than us, prepare a jump-force to eradicate the puny inhabitants of our world.
even more obscure, they found our two planets (venus/earth) sent a probe to the wrong one, it was destroyed and they do not think our system habours life, however some crazy radio astronomer insists he is receiving transmissions from our system, the only part he can decipher is the beginning beats to eastenders and it has driven him insane...
it's just lifeless and dead