1
00:00:00,000 --> 00:00:05,539
>> HUBBLE HAS DISCOVERED WATER
VAPOR ON A SUPER EARTH

2
00:00:05,539 --> 00:00:11,445
>> The Hubble Space Telescope
has made the very first
detection of water...  

3
00:00:11,445 --> 00:00:19,553
>> ...in the atmosphere of an
exoplanet orbiting in its star's
habitable zone.

4
00:00:19,553 --> 00:00:24,324
>> The habitable zone is the
region around a star where

5
00:00:24,324 --> 00:00:32,399
>> temperatures would let liquid
water exist on a planet's
surface.

6
00:00:32,399 --> 00:00:39,806
>> K2-18b, which is eight times
the mass of Earth, is the first
planet outside the solar system

7
00:00:39,806 --> 00:00:46,079
>> in the habitable zone
known to have water in its 
atmosphere.

8
00:00:46,079 --> 00:00:59,126
>> Using Hubble data, scientists
analyzed the starlight filtered
through K2-18b’s atmosphere.

9
00:00:59,126 --> 00:01:10,604
>> The team found the molecular
signature of water vapor
in the planet’s atmosphere.

10
00:01:10,604 --> 00:01:16,143
>> Located 110 light-years from
Earth, K2-18b orbits a dwarf
star that’s much smaller, cooler, and more active than

11
00:01:16,143 --> 00:01:22,816
>> the Sun, which could affect
its atmosphere and environment.

12
00:01:22,816 --> 00:01:30,023
>> While we won’t be able
to know if it’s truly habitable...

13
00:01:30,023 --> 00:01:42,569
>> we’ll use future
telescopes, like the James Webb
Space Telescope, to seek answers to one of the biggest questions.

14
00:01:42,569 --> 00:01:56,083
>> Is Earth unique? 

15
00:01:56,083 --> 00:00:00,000
[SILENCE]