I know I’m not the first one to wonder, but really…
Inside of the Earth’s gravity well I guess, You could probably even say it’s just low earth orbit if you consider the moon outer space.
Is inside the atmosphere really space though? Sure, in the sense it has a volume, but that’s not what people mean by space
The Earth’s gravity well extends far beyond the atmosphere. The moon is for example is well inside the gravity well and even the hill sphere meaning Earth’s gravity is the dominant gravity force on the moon.
Earth’s gravity extends to infinity, even though extremely small. There is always gravitational attraction between two objects.
Atmosphere might be better measure
Technically speaking, the gravity well is finite in diameter and is defined as where gravity reaches the “meh” level.
