WEBVTT 00:00.000 --> 00:15.000 We frequently hear about some discoveries of exoplanets like our Earth, or of Earth 00:15.000 --> 00:16.000 twins. 00:16.000 --> 00:20.140 How common are Earth-like habitable planets in the universe? 00:20.140 --> 00:25.320 The short answer is we have no idea how common they are because it's at the edge of our technology 00:25.320 --> 00:32.020 to even detect an Earth-sized planet in around a Sun-like star with an Earth-like orbit. 00:32.020 --> 00:36.080 And so we're just at the edge of being able to detect planets like that. 00:36.080 --> 00:39.720 Even once we detect a planet like that, we don't have the technology to determine whether 00:39.720 --> 00:41.760 there's water on the planet or not. 00:41.760 --> 00:45.680 We can't tell whether there are continents, we don't know what its rotation rate is. 00:45.680 --> 00:53.180 And so we're just beginning to measure the very basic parameters of whether a planet 00:53.180 --> 00:54.180 is Earth-like. 00:54.180 --> 00:57.060 Does it have the same kind of orbit as the same size? 00:57.060 --> 01:00.720 And does it orbit a star like the Sun? 01:00.720 --> 01:04.560 So that really doesn't answer the question of how common are Earth-twins. 01:04.560 --> 01:08.680 I suspect over the next 30 or so years we'll develop that technology, and I think what 01:08.680 --> 01:13.580 we're going to find is that there are going to be planets that look increasingly like Earth, 01:13.580 --> 01:18.220 but then it allows us to answer the real question we want is, is there life out there? 01:18.220 --> 01:22.400 And my suspicion is, my prediction is, what we will find is that we'll find planets that 01:22.400 --> 01:28.460 look increasingly like Earth, but there's going to be very little or no life on any of those 01:28.460 --> 01:33.320 planets until effectively you get something that looks almost exactly like Earth, and that's 01:33.320 --> 01:36.200 going to be a sign that God has created life somewhere else as well. 01:36.200 --> 01:39.080 So let's go. 01:39.080 --> 01:40.080 So let's go. 01:40.080 --> 01:41.080 So let's go.