1 00:00:00,040 --> 00:00:00,050 How do solar flares impact Earth? 2 00:00:00,070 --> 00:00:04,080 3 00:00:04,100 --> 00:00:08,110 A solar flare is a burst of X-ray light. 4 00:00:08,130 --> 00:00:12,130 We know that the Sun influences space all the way down to the Earth's upper atmosphere. 5 00:00:12,150 --> 00:00:16,160 A new study observed 6 00:00:16,180 --> 00:00:20,170 when the X-rays pulsated, so too did the lower ionosphere. 7 00:00:20,190 --> 00:00:24,200 The ionosphere is the lowest level of space, a region of the upper atmosphere 8 00:00:24,220 --> 00:00:28,230 about 30 - 600 feet above sea level. 9 00:00:28,250 --> 00:00:32,250 It is home to the aurora, the International Space Station, radio waves, and satellites. 10 00:00:32,270 --> 00:00:36,310 This is the first time we have seen its 11 00:00:36,330 --> 00:00:40,330 response synchronized with solar flare pulsations. 12 00:00:40,350 --> 00:00:44,360 Understanding how the Sun affects 13 00:00:44,380 --> 00:00:48,420 near-Earth space helps us learn how to protect astronauts and satellites close to home. 14 00:00:48,440 --> 00:00:52,430 tone 15 00:00:52,450 --> 00:00:56,460 beeping 16 00:00:56,480 --> 00:00:57,738 beeping