1
00:00:00,790 --> 00:00:07,320
[Music]

2
00:00:11,530 --> 00:00:09,209
[Applause]

3
00:00:13,299 --> 00:00:11,540
my name is Cynthia Phillips and I'm here

4
00:00:16,029 --> 00:00:13,309
representing the Europa Lander mission

5
00:00:19,060 --> 00:00:16,039
concept some of my partners in crime

6
00:00:21,490 --> 00:00:19,070
from the pre project project science

7
00:00:24,849 --> 00:00:21,500
group are a kevin hand morgan cable Amy

8
00:00:26,259 --> 00:00:24,859
Hoffman Kate craft as well as a number

9
00:00:27,759 --> 00:00:26,269
of people who are on the your plan

10
00:00:31,120 --> 00:00:27,769
they're pre project science and

11
00:00:31,920 --> 00:00:31,130
engineering teams so what is Europa

12
00:00:37,930 --> 00:00:31,930
Lander

13
00:00:41,080 --> 00:00:37,940
title says to land on the surface of

14
00:00:42,880 --> 00:00:41,090
Europa and one of the reasons why Europa

15
00:00:45,190 --> 00:00:42,890
is one of the best places to go in my

16
00:00:46,600 --> 00:00:45,200
opinion in the solar system is that it

17
00:00:48,310 --> 00:00:46,610
perhaps is one of the best places to

18
00:00:49,990 --> 00:00:48,320
look for life beyond the earth and it's

19
00:00:51,580 --> 00:00:50,000
a good place to look for extant life so

20
00:00:54,459 --> 00:00:51,590
life that can be there today

21
00:00:56,500 --> 00:00:54,469
and so the Europa Lander mission concept

22
00:00:59,139 --> 00:00:56,510
started with a set of top-level science

23
00:01:01,000 --> 00:00:59,149
goals these included a goal to search

24
00:01:03,999 --> 00:01:01,010
for evidence of bio signatures on Europa

25
00:01:06,790 --> 00:01:04,009
to assess the habitability of Europa via

26
00:01:08,290 --> 00:01:06,800
in situ techniques and to characterize

27
00:01:11,050 --> 00:01:08,300
the surface and the subsurface

28
00:01:13,300 --> 00:01:11,060
and as is typical when you have a

29
00:01:15,400 --> 00:01:13,310
science definition team the SCT took

30
00:01:19,719 --> 00:01:15,410
those set of goals and turned them into

31
00:01:21,160 --> 00:01:19,729
a set of objectives these goals and

32
00:01:23,589 --> 00:01:21,170
objectives then become addressed with a

33
00:01:27,070 --> 00:01:23,599
focus model payload and so in this

34
00:01:29,260 --> 00:01:27,080
mission concept we now can expand these

35
00:01:30,850 --> 00:01:29,270
set these three goals into a number of

36
00:01:33,100 --> 00:01:30,860
objectives that are shown around here

37
00:01:35,320 --> 00:01:33,110
and then you can think about what

38
00:01:37,839 --> 00:01:35,330
instruments you would need and so in

39
00:01:39,400 --> 00:01:37,849
this case we really wanted a focus

40
00:01:41,320 --> 00:01:39,410
payload that would include instruments

41
00:01:42,219 --> 00:01:41,330
that would address more than one of

42
00:01:45,010 --> 00:01:42,229
these aspects of the mission

43
00:01:46,779 --> 00:01:45,020
simultaneously and so the model payload

44
00:01:48,940 --> 00:01:46,789
has a gas chromatograph mass

45
00:01:51,699 --> 00:01:48,950
spectrometer it has a microscope it has

46
00:01:53,830 --> 00:01:51,709
something like a Raman it has context

47
00:01:56,529 --> 00:01:53,840
camera or cameras and it also has a

48
00:01:59,529 --> 00:01:56,539
geophone or a seismic package and so

49
00:02:01,809 --> 00:01:59,539
when we combine together the the those

50
00:02:04,300 --> 00:02:01,819
elements of the science payload we then

51
00:02:06,249 --> 00:02:04,310
have a robust mission concept and so the

52
00:02:09,180 --> 00:02:06,259
basic idea is that this D this is a

53
00:02:13,660 --> 00:02:09,190
large mission it has to launch on an SLS

54
00:02:15,699 --> 00:02:13,670
the cruise from Earth to Jupiter's about

55
00:02:18,160 --> 00:02:15,709
five years on an SLS and that's with a

56
00:02:20,560 --> 00:02:18,170
gravity assist either Mars or Earth

57
00:02:22,090 --> 00:02:20,570
depending on the launch date and then

58
00:02:23,590 --> 00:02:22,100
it's about another two years after

59
00:02:26,170 --> 00:02:23,600
before we actually land on the surface

60
00:02:27,910 --> 00:02:26,180
of Europa the carrier stage in this

61
00:02:29,830 --> 00:02:27,920
mission concept is that it's a dumb

62
00:02:31,720 --> 00:02:29,840
carrier so basically all the brains are

63
00:02:33,610 --> 00:02:31,730
on the lander itself you have a large

64
00:02:36,580 --> 00:02:33,620
carrier it's actually larger than the

65
00:02:38,560 --> 00:02:36,590
Europe a clipper wingspan but once it

66
00:02:40,510 --> 00:02:38,570
drops off its payload in Europe orbit

67
00:02:43,450 --> 00:02:40,520
the carrier flies off into a disposal

68
00:02:46,330 --> 00:02:43,460
orbit the just deorbit de-scented

69
00:02:48,340 --> 00:02:46,340
landing stage uses a sky crane this is

70
00:02:49,600 --> 00:02:48,350
with a 10 meter tether and that's

71
00:02:51,040 --> 00:02:49,610
because on Europe but there is no

72
00:02:53,050 --> 00:02:51,050
preacher atmosphere so that means that

73
00:02:55,000 --> 00:02:53,060
aerobraking parachutes airbags just

74
00:02:56,320 --> 00:02:55,010
don't work there but fortunately a sky

75
00:02:58,150 --> 00:02:56,330
crane turns out to work really well for

76
00:02:59,650 --> 00:02:58,160
delivering payload to the surface and

77
00:03:02,500 --> 00:02:59,660
actually because there's no atmosphere

78
00:03:04,420 --> 00:03:02,510
you are able to land with a hundred

79
00:03:07,750 --> 00:03:04,430
meter accuracy there's nothing to blow

80
00:03:08,950 --> 00:03:07,760
you downstream you can just land you can

81
00:03:12,370 --> 00:03:08,960
basically pick a point on the surface

82
00:03:14,140 --> 00:03:12,380
and with some help along the way through

83
00:03:15,520 --> 00:03:14,150
terrain relative navigation and an

84
00:03:17,410 --> 00:03:15,530
onboard lidar for hazard avoidance

85
00:03:19,690 --> 00:03:17,420
you're able to land on the surface

86
00:03:22,540 --> 00:03:19,700
basically wherever you want to put this

87
00:03:24,730 --> 00:03:22,550
and once you're on the surface it's a

88
00:03:26,560 --> 00:03:24,740
bio signature science mission so the

89
00:03:28,390 --> 00:03:26,570
idea is that will excavate to about 10

90
00:03:30,520 --> 00:03:28,400
centimeters below the surface will

91
00:03:31,840 --> 00:03:30,530
collect a sample I'm using a sampling

92
00:03:33,460 --> 00:03:31,850
system and then analyze it

93
00:03:35,340 --> 00:03:33,470
onboard the spacecraft with that model

94
00:03:37,810 --> 00:03:35,350
payload that I just discussed and

95
00:03:39,910 --> 00:03:37,820
because Europa surfaces in such a high

96
00:03:42,310 --> 00:03:39,920
radiation environment what that means is

97
00:03:43,930 --> 00:03:42,320
that this is a short mission so we just

98
00:03:46,180 --> 00:03:43,940
heard about dragonfly which is about it

99
00:03:48,970 --> 00:03:46,190
two and a half year nominal mission here

100
00:03:51,760 --> 00:03:48,980
we're talking about 22 days so it's a

101
00:03:52,990 --> 00:03:51,770
short compressed mission and as you'll

102
00:03:55,570 --> 00:03:53,000
see in a bit that requires quite a bit

103
00:03:57,850 --> 00:03:55,580
of autonomy to perform the mission but

104
00:03:59,440 --> 00:03:57,860
we believe that we're able to to perform

105
00:04:01,990 --> 00:03:59,450
this mission we're able to complete our

106
00:04:04,990 --> 00:04:02,000
science goals robustly even given that

107
00:04:07,510 --> 00:04:05,000
limited time span and so here's just a

108
00:04:09,330 --> 00:04:07,520
nice overview because it's always easier

109
00:04:11,320 --> 00:04:09,340
to visualize something with a picture so

110
00:04:13,990 --> 00:04:11,330
here's the Europa Lander spacecraft

111
00:04:15,430 --> 00:04:14,000
coming into Jupiter orbit and you can

112
00:04:18,220 --> 00:04:15,440
see that the spacecraft here I'll just

113
00:04:20,590 --> 00:04:18,230
point out the mouse it's encased in a

114
00:04:22,030 --> 00:04:20,600
bio barrier planetary protection is an

115
00:04:23,800 --> 00:04:22,040
important concern when we're landing on

116
00:04:25,450 --> 00:04:23,810
the surface of Europa but we have a

117
00:04:26,920 --> 00:04:25,460
great team who's been addressing this

118
00:04:29,260 --> 00:04:26,930
and we think that we can do this in a

119
00:04:31,240 --> 00:04:29,270
way that that meets all of the planetary

120
00:04:32,950 --> 00:04:31,250
protection requirements so the

121
00:04:33,340 --> 00:04:32,960
spacecraft again we're on this very

122
00:04:35,230 --> 00:04:33,350
large

123
00:04:37,270 --> 00:04:35,240
solar-powered carrier stage that's

124
00:04:39,250 --> 00:04:37,280
larger than the than the wingspan of the

125
00:04:40,540 --> 00:04:39,260
Europa clipper spacecraft so that's

126
00:04:43,960 --> 00:04:40,550
about the size of a basketball field

127
00:04:46,150 --> 00:04:43,970
we're talking a lot of solar panels we

128
00:04:49,060 --> 00:04:46,160
dumped the carrier into a disposal orbit

129
00:04:51,310 --> 00:04:49,070
and here comes the deorbit descent and

130
00:04:54,070 --> 00:04:51,320
landing stage as the spacecraft is

131
00:04:57,160 --> 00:04:54,080
released from its from its bio barrier

132
00:04:59,080 --> 00:04:57,170
it then takes over and so you can see

133
00:05:00,160 --> 00:04:59,090
here this this animation shows slightly

134
00:05:01,810 --> 00:05:00,170
you'll see you'll see a number of

135
00:05:03,370 --> 00:05:01,820
different versions of the spacecraft

136
00:05:05,470 --> 00:05:03,380
throughout the imagery that I show in

137
00:05:07,180 --> 00:05:05,480
this talk in this one you'll see that

138
00:05:09,220 --> 00:05:07,190
the landing portion looks slightly

139
00:05:10,450 --> 00:05:09,230
different that's just because we still

140
00:05:12,820 --> 00:05:10,460
have a number of open trades on the

141
00:05:15,370 --> 00:05:12,830
engineering side as we proceed so here's

142
00:05:19,390 --> 00:05:15,380
the spacecraft we are continuing with

143
00:05:21,520 --> 00:05:19,400
the descent stage and so we have a

144
00:05:23,650 --> 00:05:21,530
series of thrusters that are on the

145
00:05:27,100 --> 00:05:23,660
spacecraft itself to basically

146
00:05:29,110 --> 00:05:27,110
decelerate it and take it down there we

147
00:05:31,690 --> 00:05:29,120
go keep to it to decelerate it and take

148
00:05:33,430 --> 00:05:31,700
it down to the surface once we get close

149
00:05:35,260 --> 00:05:33,440
to the surface we've already chosen a

150
00:05:36,340 --> 00:05:35,270
location on the surface to land using

151
00:05:38,650 --> 00:05:36,350
imagery from the Europa clipper

152
00:05:40,330 --> 00:05:38,660
spacecraft and now we're heading for

153
00:05:42,460 --> 00:05:40,340
that location using something called

154
00:05:43,780 --> 00:05:42,470
terrain relative navigation that means

155
00:05:46,240 --> 00:05:43,790
that we've loaded the highest resolution

156
00:05:48,340 --> 00:05:46,250
images we have of the landing site from

157
00:05:49,990 --> 00:05:48,350
Europe a clipper and then images that

158
00:05:52,180 --> 00:05:50,000
are taken during landing are matched to

159
00:05:54,250 --> 00:05:52,190
that as well as active hazard voidance

160
00:05:55,660 --> 00:05:54,260
so that we can land on the surface so

161
00:05:58,270 --> 00:05:55,670
you saw those adaptable landing

162
00:05:59,530 --> 00:05:58,280
stabilizer legs as it came down the

163
00:06:01,600 --> 00:05:59,540
spacecraft is actually supported by a

164
00:06:04,000 --> 00:06:01,610
belly pan that's right in the center the

165
00:06:07,600 --> 00:06:04,010
stabilizers basically help so that if

166
00:06:10,210 --> 00:06:07,610
you land on an obstacle that's nominally

167
00:06:12,700 --> 00:06:10,220
about half a meter high up to as much as

168
00:06:15,280 --> 00:06:12,710
a meter you're still able to land you

169
00:06:16,900 --> 00:06:15,290
lock the stabilizer legs in place once

170
00:06:18,760 --> 00:06:16,910
the belly pan touches the surface and

171
00:06:21,160 --> 00:06:18,770
that holds the deck in a nice horizontal

172
00:06:23,710 --> 00:06:21,170
position even if you land on very rough

173
00:06:25,870 --> 00:06:23,720
terrain once the spacecraft has checked

174
00:06:29,770 --> 00:06:25,880
out the surroundings we then undock the

175
00:06:31,390 --> 00:06:29,780
sampling arm so this device had in in

176
00:06:33,520 --> 00:06:31,400
this this version and again this is also

177
00:06:36,160 --> 00:06:33,530
an open trade in this version we have a

178
00:06:38,860 --> 00:06:36,170
Bible aid saw tool which is able to dig

179
00:06:40,900 --> 00:06:38,870
about 10 centimeters below the surface

180
00:06:42,909 --> 00:06:40,910
and 10 centimeters is far enough down

181
00:06:45,250 --> 00:06:42,919
where you're below the bulk of the

182
00:06:46,930 --> 00:06:45,260
radiation processing and so what that

183
00:06:49,030 --> 00:06:46,940
means is that we can sample more

184
00:06:51,220 --> 00:06:49,040
in surface material to look for those

185
00:06:52,810 --> 00:06:51,230
evidence of bio signatures once we've

186
00:06:54,130 --> 00:06:52,820
dug that trench and of course in real

187
00:06:55,810 --> 00:06:54,140
life digging the trench would take a bit

188
00:06:57,760 --> 00:06:55,820
longer and yes and tailings to deal with

189
00:06:59,770 --> 00:06:57,770
but here you're basically collecting now

190
00:07:01,420 --> 00:06:59,780
a sample from the bottom of that trench

191
00:07:02,830 --> 00:07:01,430
and in this version we're using a sample

192
00:07:04,410 --> 00:07:02,840
acquisition system that's a little bit

193
00:07:06,460 --> 00:07:04,420
similar to what we did on Mars Phoenix

194
00:07:08,470 --> 00:07:06,470
and we're looking at multiple different

195
00:07:09,940 --> 00:07:08,480
ways of doing that the sample is then

196
00:07:11,380 --> 00:07:09,950
transferred to the spacecraft and then

197
00:07:13,810 --> 00:07:11,390
again onboard the spacecraft we have

198
00:07:16,210 --> 00:07:13,820
that model payload of analysis

199
00:07:18,970 --> 00:07:16,220
instruments including a GCMs a Raman a

200
00:07:21,130 --> 00:07:18,980
microscope and again we also have a

201
00:07:23,830 --> 00:07:21,140
seismometer a geophone as well as

202
00:07:27,100 --> 00:07:23,840
context cameras on the surface and so

203
00:07:31,210 --> 00:07:27,110
this would take place semi-autonomous Li

204
00:07:32,680 --> 00:07:31,220
there is room for ground input but a lot

205
00:07:35,140 --> 00:07:32,690
of the a lot of what needs to be done

206
00:07:37,060 --> 00:07:35,150
needs to be done autonomously by the

207
00:07:40,180 --> 00:07:37,070
spacecraft so here's just some details

208
00:07:42,790 --> 00:07:40,190
showing you can see here that the the

209
00:07:44,410 --> 00:07:42,800
landing feet here look a little bit more

210
00:07:46,150 --> 00:07:44,420
speed half spherical rather than the

211
00:07:47,580 --> 00:07:46,160
flat ones previously so we're looking at

212
00:07:51,040 --> 00:07:47,590
a number of different foot designs

213
00:07:52,840 --> 00:07:51,050
perhaps these here can be deformable so

214
00:07:54,340 --> 00:07:52,850
that again if you land on rough tree and

215
00:07:57,970 --> 00:07:54,350
you're able to stabilize yourself more

216
00:08:00,370 --> 00:07:57,980
carefully and so when we're thinking

217
00:08:00,880 --> 00:08:00,380
about the science surface operations of

218
00:08:02,980 --> 00:08:00,890
this mission

219
00:08:05,170 --> 00:08:02,990
we start with Europe a clipper data and

220
00:08:07,480 --> 00:08:05,180
that provides us with a scientifically

221
00:08:10,750 --> 00:08:07,490
compelling landing site with a number of

222
00:08:12,790 --> 00:08:10,760
these candidates and so the instruments

223
00:08:14,950 --> 00:08:12,800
on clipper will give us surface

224
00:08:17,200 --> 00:08:14,960
composition morphology degree of

225
00:08:19,570 --> 00:08:17,210
radiation processing etc and we'll use

226
00:08:21,070 --> 00:08:19,580
that data to help select a site that's

227
00:08:22,630 --> 00:08:21,080
scientifically interesting but is also

228
00:08:24,370 --> 00:08:22,640
viable from an engineering perspective

229
00:08:28,360 --> 00:08:24,380
we want to make sure we can land there

230
00:08:32,230 --> 00:08:28,370
safely the because again of that of the

231
00:08:34,300 --> 00:08:32,240
primary battery architecture that comes

232
00:08:36,040 --> 00:08:34,310
from the fact that radiation damage

233
00:08:37,990 --> 00:08:36,050
would probably destroy the spacecraft in

234
00:08:39,459 --> 00:08:38,000
approximately a month so there's no

235
00:08:41,050 --> 00:08:39,469
point in bringing more power than you

236
00:08:43,779 --> 00:08:41,060
need so this is a mission where it

237
00:08:46,750 --> 00:08:43,789
doesn't make sense to use an RTG using

238
00:08:48,310 --> 00:08:46,760
batteries that are sized to be able to

239
00:08:49,900 --> 00:08:48,320
survive to keep your spacecraft alive

240
00:08:51,760 --> 00:08:49,910
long enough to do its primary mission

241
00:08:53,410 --> 00:08:51,770
but you basically want to run out of

242
00:08:55,030 --> 00:08:53,420
battery power about the time when

243
00:08:57,070 --> 00:08:55,040
radiation damage would have killed your

244
00:08:58,120 --> 00:08:57,080
spacecraft anyway and so these are open

245
00:09:00,070 --> 00:08:58,130
trades that we're working with the

246
00:09:00,610 --> 00:09:00,080
engineering team but we'll need the

247
00:09:01,930 --> 00:09:00,620
lander to be

248
00:09:03,340 --> 00:09:01,940
highly automated we'll need it to be

249
00:09:06,460 --> 00:09:03,350
designed for uncertain surface

250
00:09:08,910 --> 00:09:06,470
topography and materials and again we'll

251
00:09:11,200 --> 00:09:08,920
need a high degree of autonomy for the

252
00:09:13,450 --> 00:09:11,210
location of the trench that we choose to

253
00:09:14,740 --> 00:09:13,460
take and how samples are acquired from

254
00:09:17,980 --> 00:09:14,750
that trench and analyzed by the

255
00:09:19,450 --> 00:09:17,990
instrumentation so an exciting bit of

256
00:09:23,170 --> 00:09:19,460
progress on the Europa Lander mission

257
00:09:24,760 --> 00:09:23,180
concept is that we recently had 14 teams

258
00:09:27,940 --> 00:09:24,770
that were selected as part of this ic2

259
00:09:29,800 --> 00:09:27,950
program through NASA roses and so those

260
00:09:30,940 --> 00:09:29,810
teams are listed here and you can see

261
00:09:32,530 --> 00:09:30,950
that many of these fit into the

262
00:09:34,780 --> 00:09:32,540
categories that were listed in the model

263
00:09:36,460 --> 00:09:34,790
payload there's with some interesting

264
00:09:40,300 --> 00:09:36,470
additions that are left to die down here

265
00:09:42,040 --> 00:09:40,310
on the right such as a and so so

266
00:09:44,200 --> 00:09:42,050
basically what this does is it allows us

267
00:09:45,730 --> 00:09:44,210
to work with these teams to really help

268
00:09:48,340 --> 00:09:45,740
to mature their technology and really

269
00:09:50,110 --> 00:09:48,350
help mature not just this not just their

270
00:09:51,760 --> 00:09:50,120
instrument concept but to think about

271
00:09:53,770 --> 00:09:51,770
how these instruments will work with the

272
00:09:55,720 --> 00:09:53,780
whole spacecraft because clearly on a

273
00:09:58,120 --> 00:09:55,730
spacecraft like this that is it's small

274
00:10:00,400 --> 00:09:58,130
it's very limited in mass power volume

275
00:10:01,750 --> 00:10:00,410
and time we have to have a payload that

276
00:10:04,480 --> 00:10:01,760
works very well together and that's

277
00:10:06,040 --> 00:10:04,490
highly integrated so as we think about

278
00:10:08,020 --> 00:10:06,050
the path forward for this Europa Lander

279
00:10:09,430 --> 00:10:08,030
mission concept again this is not a

280
00:10:11,590 --> 00:10:09,440
mission that has been funded yet we have

281
00:10:13,810 --> 00:10:11,600
not yet gone into phase a but the

282
00:10:15,580 --> 00:10:13,820
mission has years of development behind

283
00:10:18,550 --> 00:10:15,590
it and it's really a very mature and

284
00:10:22,780 --> 00:10:18,560
exciting mission concept and so over the

285
00:10:24,820 --> 00:10:22,790
next two years we have about 50 actually

286
00:10:26,770 --> 00:10:24,830
advanced development activities and so

287
00:10:29,110 --> 00:10:26,780
these include lab work on cryogenic ice

288
00:10:31,180 --> 00:10:29,120
properties improvements of the sampling

289
00:10:33,600 --> 00:10:31,190
system studies of surface autonomy

290
00:10:35,710 --> 00:10:33,610
better development of battery design

291
00:10:39,100 --> 00:10:35,720
more study of planetary protection

292
00:10:40,960 --> 00:10:39,110
constraints a detailed look at

293
00:10:43,510 --> 00:10:40,970
contamination control how can we make

294
00:10:46,000 --> 00:10:43,520
sure that the thrusters on the rocket

295
00:10:48,490 --> 00:10:46,010
don't actually don't actually disturb

296
00:10:50,260 --> 00:10:48,500
the surface to a to grade 2 degree for

297
00:10:53,740 --> 00:10:50,270
us to be able to sample pristine

298
00:10:55,330 --> 00:10:53,750
material and so the teams on IC 2

299
00:10:56,860 --> 00:10:55,340
they'll be working with the Europa

300
00:10:59,530 --> 00:10:56,870
Lander pre project for the next two

301
00:11:01,540 --> 00:10:59,540
years yesterday we had a very successful

302
00:11:03,310 --> 00:11:01,550
workshop called the instrumentation for

303
00:11:05,530 --> 00:11:03,320
the institute exploration of Europa and

304
00:11:07,510 --> 00:11:05,540
ocean world's we had about 150

305
00:11:09,430 --> 00:11:07,520
participants thank you to those of you

306
00:11:10,750 --> 00:11:09,440
came again we apologize for the very

307
00:11:12,790 --> 00:11:10,760
small room but that really shows the

308
00:11:14,420 --> 00:11:12,800
excitement about these but this future

309
00:11:16,310 --> 00:11:14,430
exploration

310
00:11:19,240 --> 00:11:16,320
and we're likely going to be hosting a

311
00:11:21,350 --> 00:11:19,250
full multi-day workshop early next year

312
00:11:23,870 --> 00:11:21,360
we also need to be thinking about the

313
00:11:26,090 --> 00:11:23,880
Takeda survey for those of us who think

314
00:11:28,190 --> 00:11:26,100
about in-situ exploration of ocean icy

315
00:11:30,920 --> 00:11:28,200
worlds Europa Lander needs to be a

316
00:11:32,960 --> 00:11:30,930
priority even with the exciting

317
00:11:35,870 --> 00:11:32,970
selection of dragonfly that's a very

318
00:11:39,470 --> 00:11:35,880
different end member from the surface of

319
00:11:41,060 --> 00:11:39,480
a place like Europa and so it'll be very

320
00:11:42,769 --> 00:11:41,070
interesting to see what dragonfly gives

321
00:11:44,180 --> 00:11:42,779
us but it would be really even more

322
00:11:46,519 --> 00:11:44,190
interesting if we could compare and

323
00:11:48,470 --> 00:11:46,529
contrast what we see on the surface of a

324
00:11:51,350 --> 00:11:48,480
world like Titan with what we see on the

325
00:11:51,740 --> 00:11:51,360
surface of a world like Europa and all

326
00:11:52,760 --> 00:11:51,750
in there

327
00:11:53,090 --> 00:11:52,770
thank you