Sky & Telescope - February 2024 - 13

Hope at Mars
The orbiter of a nascent space agency is giving scientists a big-picture
view of the Red Planet's atmosphere.
O
n February 9, 2021, a new spacecraft arrived in
Mars orbit. It wasn't American, European, or
Indian - and the Russians have long been out of
the game. It belonged to the United Arab Emirates, a small
nation on the Arabian Peninsula, which seven years earlier
didn't even have a space agency. In fact when Neil Armstrong
set foot on the Moon, the UAE didn't exist as an
independent country.
The Emirates Mars Mission (EMM), also called Al-Amal
or " Hope, " was designed to obtain a comprehensive view
of Mars's atmosphere and answer specific questions about
the Martian climate and weather. To do so, Hope flies in
a wider orbit than any other spacecraft does around the
planet, giving it a clear vista of an entire hemisphere at
once. It carries a multiband camera and two spectrometers
that can analyze the light coming from Mars in wavelengths
ranging from infrared to extreme ultraviolet.
Hope's vantage point and high-cadence observations
are already providing a unique view of evolving processes
such as cloud formation, dust storms, and atmospheric
loss. It has discovered previously unknown phenomena,
including a new kind of aurora. Other spacecraft, such as
NASA's Mars Atmosphere and Volatile Evolution (MAVEN)
mission, have captured glimpses of Martian aurorae, but
scientists didn't know their full scale.
Several flybys have also brought the spacecraft unprecedentedly
close to Mars's outer moon, Deimos. The observations
appear to refute one popular theory for Deimos's
origin, shining new light on this mysterious satellite.
Hope remains in orbit, and its mission has been
uUNIQUE ORBIT The Emirati Hope spacecraft has a bird's-eye view
of Mars, looping far beyond the orbits of other active craft (white). The
orbit is inclined 25° to the Red Planet's equatorial plane, unlike the
pole-looping paths of the other orbiters.
extended for another year. The success places UAE on the
shortlist of space agencies that have reached the Red Planet
(five at the time of its arrival) and makes the Emiratis the
third to successfully reach Mars on the first try. Let's take
a deeper look at what the mission has achieved so far.
A New Look at the Martian Atmosphere
One of the reasons the UAE embarked on this mission was
to develop the country's science and engineering capabilities.
Emiratis didn't want to just replicate what others had
done in the past - they wanted to produce new science
that would lead to scientific progress and international
collaborations.
Hope
Deimos
Phobos
Mars
Global
Surveyor
Mars
Express
Mars
Reconnaissance
Orbiter
MAVEN
sk yand tele scope .o r g * FEBRUARY 2024 13
LEAH TISCIONE / S&T, SOURCE: H. E. S. AMIRI ET AL. /
SPACE SCIENCE REVIEWS 2022

http://skyandtelescope.org

Sky & Telescope - February 2024

Table of Contents for the Digital Edition of Sky & Telescope - February 2024

Contents
Sky & Telescope - February 2024 - Cover1
Sky & Telescope - February 2024 - Cover2
Sky & Telescope - February 2024 - 1
Sky & Telescope - February 2024 - Contents
Sky & Telescope - February 2024 - 3
Sky & Telescope - February 2024 - 4
Sky & Telescope - February 2024 - 5
Sky & Telescope - February 2024 - 6
Sky & Telescope - February 2024 - 7
Sky & Telescope - February 2024 - 8
Sky & Telescope - February 2024 - 9
Sky & Telescope - February 2024 - 10
Sky & Telescope - February 2024 - 11
Sky & Telescope - February 2024 - 12
Sky & Telescope - February 2024 - 13
Sky & Telescope - February 2024 - 14
Sky & Telescope - February 2024 - 15
Sky & Telescope - February 2024 - 16
Sky & Telescope - February 2024 - 17
Sky & Telescope - February 2024 - 18
Sky & Telescope - February 2024 - 19
Sky & Telescope - February 2024 - 20
Sky & Telescope - February 2024 - 21
Sky & Telescope - February 2024 - 22
Sky & Telescope - February 2024 - 23
Sky & Telescope - February 2024 - 24
Sky & Telescope - February 2024 - 25
Sky & Telescope - February 2024 - 26
Sky & Telescope - February 2024 - 27
Sky & Telescope - February 2024 - 28
Sky & Telescope - February 2024 - 29
Sky & Telescope - February 2024 - 30
Sky & Telescope - February 2024 - 31
Sky & Telescope - February 2024 - 32
Sky & Telescope - February 2024 - 33
Sky & Telescope - February 2024 - 34
Sky & Telescope - February 2024 - 35
Sky & Telescope - February 2024 - 36
Sky & Telescope - February 2024 - 37
Sky & Telescope - February 2024 - 38
Sky & Telescope - February 2024 - 39
Sky & Telescope - February 2024 - 40
Sky & Telescope - February 2024 - 41
Sky & Telescope - February 2024 - 42
Sky & Telescope - February 2024 - 43
Sky & Telescope - February 2024 - 44
Sky & Telescope - February 2024 - 45
Sky & Telescope - February 2024 - 46
Sky & Telescope - February 2024 - 47
Sky & Telescope - February 2024 - 48
Sky & Telescope - February 2024 - 49
Sky & Telescope - February 2024 - 50
Sky & Telescope - February 2024 - 51
Sky & Telescope - February 2024 - 52
Sky & Telescope - February 2024 - 53
Sky & Telescope - February 2024 - 54
Sky & Telescope - February 2024 - 55
Sky & Telescope - February 2024 - 56
Sky & Telescope - February 2024 - 57
Sky & Telescope - February 2024 - 58
Sky & Telescope - February 2024 - 59
Sky & Telescope - February 2024 - 60
Sky & Telescope - February 2024 - 61
Sky & Telescope - February 2024 - 62
Sky & Telescope - February 2024 - 63
Sky & Telescope - February 2024 - 64
Sky & Telescope - February 2024 - 65
Sky & Telescope - February 2024 - 66
Sky & Telescope - February 2024 - 67
Sky & Telescope - February 2024 - 68
Sky & Telescope - February 2024 - 69
Sky & Telescope - February 2024 - 70
Sky & Telescope - February 2024 - 71
Sky & Telescope - February 2024 - 72
Sky & Telescope - February 2024 - 73
Sky & Telescope - February 2024 - 74
Sky & Telescope - February 2024 - 75
Sky & Telescope - February 2024 - 76
Sky & Telescope - February 2024 - 77
Sky & Telescope - February 2024 - 78
Sky & Telescope - February 2024 - 79
Sky & Telescope - February 2024 - 80
Sky & Telescope - February 2024 - 81
Sky & Telescope - February 2024 - 82
Sky & Telescope - February 2024 - 83
Sky & Telescope - February 2024 - 84
Sky & Telescope - February 2024 - Cover3
Sky & Telescope - February 2024 - Cover4
https://www.nxtbook.com/nxtbooks/aas/st_202408
https://www.nxtbook.com/nxtbooks/aas/st_202407
https://www.nxtbook.com/nxtbooks/aas/st_202406
https://www.nxtbook.com/nxtbooks/aas/st_202405
https://www.nxtbook.com/nxtbooks/aas/st_202404_qr
https://www.nxtbook.com/nxtbooks/aas/st_202404
https://www.nxtbook.com/nxtbooks/aas/st_202403
https://www.nxtbook.com/nxtbooks/aas/st_202402
https://www.nxtbook.com/nxtbooks/aas/st_202401_aus
https://www.nxtbook.com/nxtbooks/aas/st_202401
https://www.nxtbook.com/nxtbooks/aas/st_202312_aus
https://www.nxtbook.com/nxtbooks/aas/st_202312
https://www.nxtbook.com/nxtbooks/aas/st_202311
https://www.nxtbook.com/nxtbooks/aas/st_202310
https://www.nxtbook.com/nxtbooks/aas/st_202309
https://www.nxtbook.com/nxtbooks/aas/st_202308
https://www.nxtbook.com/nxtbooks/aas/st_202307
https://www.nxtbook.com/nxtbooks/aas/st_202306
https://www.nxtbook.com/nxtbooks/aas/st_202305
https://www.nxtbook.com/nxtbooks/aas/st_202304
https://www.nxtbook.com/nxtbooks/aas/st_202304_qr
https://www.nxtbook.com/nxtbooks/aas/st_202303
https://www.nxtbook.com/nxtbooks/aas/st_202302
https://www.nxtbook.com/nxtbooks/aas/st_202301
https://www.nxtbook.com/nxtbooks/aas/st_202212
https://www.nxtbook.com/nxtbooks/aas/st_202211
https://www.nxtbook.com/nxtbooks/aas/st_202210
https://www.nxtbook.com/nxtbooks/aas/st_202209
https://www.nxtbook.com/nxtbooks/aas/st_202208
https://www.nxtbook.com/nxtbooks/aas/st_202207
https://www.nxtbook.com/nxtbooks/aas/st_202206
https://www.nxtbook.com/nxtbooks/aas/st_202205
https://www.nxtbook.com/nxtbooks/aas/st_202204
https://www.nxtbook.com/nxtbooks/aas/st_202203
https://www.nxtbook.com/nxtbooks/aas/st_202202
https://www.nxtbook.com/nxtbooks/aas/st_202201
https://www.nxtbook.com/nxtbooks/aas/st_202112
https://www.nxtbook.com/nxtbooks/aas/st_202111
https://www.nxtbook.com/nxtbooks/aas/st_202110
https://www.nxtbook.com/nxtbooks/aas/st_202109
https://www.nxtbook.com/nxtbooks/aas/st_202108
https://www.nxtbook.com/nxtbooks/aas/st_202107
https://www.nxtbook.com/nxtbooks/aas/st_202106
https://www.nxtbook.com/nxtbooks/aas/st_202105
https://www.nxtbook.com/nxtbooks/aas/st_202104
https://www.nxtbook.com/nxtbooks/aas/st_202103
https://www.nxtbook.com/nxtbooks/aas/st_202102
https://www.nxtbook.com/nxtbooks/aas/st_202101
https://www.nxtbook.com/nxtbooks/aas/skywatch_2021
https://www.nxtbook.com/nxtbooks/aas/st_202012
https://www.nxtbook.com/nxtbooks/aas/st_202011
https://www.nxtbook.com/nxtbooks/aas/st_202010
https://www.nxtbook.com/nxtbooks/aas/st_202009
https://www.nxtbook.com/nxtbooks/aas/st_202008
https://www.nxtbook.com/nxtbooks/aas/st_202007
https://www.nxtbook.com/nxtbooks/aas/st_202006
https://www.nxtbook.com/nxtbooks/aas/st_202005
https://www.nxtbook.com/nxtbooks/aas/st_202004
https://www.nxtbook.com/nxtbooks/aas/st_202003
https://www.nxtbook.com/nxtbooks/aas/st_202002
https://www.nxtbook.com/nxtbooks/aas/st_202001
https://www.nxtbook.com/nxtbooks/aas/st_201912
https://www.nxtbook.com/nxtbooks/aas/st_201911
https://www.nxtbook.com/nxtbooks/aas/st_201910
https://www.nxtbook.com/nxtbooks/aas/st_201909
https://www.nxtbook.com/nxtbooks/aas/st_201908
https://www.nxtbook.com/nxtbooks/aas/st_201907
https://www.nxtbook.com/nxtbooks/aas/st_201906
https://www.nxtbook.com/nxtbooks/aas/st_201905
https://www.nxtbook.com/nxtbooks/aas/st_201904
https://www.nxtbook.com/nxtbooks/aas/st_201903
https://www.nxtbook.com/nxtbooks/aas/st_201902
https://www.nxtbook.com/nxtbooks/aas/st_201901
https://www.nxtbook.com/nxtbooks/aas/st_201812
https://www.nxtbook.com/nxtbooks/aas/st_201811
https://www.nxtbook.com/nxtbooks/aas/st_201810
https://www.nxtbook.com/nxtbooks/aas/st_201809
https://www.nxtbook.com/nxtbooks/aas/st_201808
https://www.nxtbook.com/nxtbooks/aas/st_201807
https://www.nxtbook.com/nxtbooks/aas/st_201806
https://www.nxtbook.com/nxtbooks/aas/st_201805
https://www.nxtbook.com/nxtbooks/aas/st_201804
https://www.nxtbook.com/nxtbooks/aas/st_201803
https://www.nxtbook.com/nxtbooks/aas/st_201802
https://www.nxtbook.com/nxtbooks/aas/st_201801
https://www.nxtbook.com/nxtbooks/aas/st_201712
https://www.nxtbook.com/nxtbooks/aas/st_201711
https://www.nxtbook.com/nxtbooks/aas/st_201710
https://www.nxtbook.com/nxtbooks/aas/st_201709
https://www.nxtbook.com/nxtbooks/aas/st_201708
https://www.nxtbook.com/nxtbooks/aas/st_201707
https://www.nxtbook.com/nxtbooks/aas/st_201706
https://www.nxtbook.com/nxtbooks/aas/st_201705
https://www.nxtbook.com/nxtbooks/aas/st_201704
https://www.nxtbook.com/nxtbooks/aas/st_201703
https://www.nxtbook.com/nxtbooks/aas/st_201702
https://www.nxtbook.com/nxtbooks/aas/st_201701
https://www.nxtbook.com/nxtbooks/aas/st_201612
https://www.nxtbook.com/nxtbooks/aas/st_201611
https://www.nxtbook.com/nxtbooks/aas/st_201610
https://www.nxtbook.com/nxtbooks/aas/st_201609
https://www.nxtbook.com/nxtbooks/aas/st_201608
https://www.nxtbook.com/nxtbooks/aas/st_201607
https://www.nxtbook.com/nxtbooks/aas/st_201606
https://www.nxtbook.com/nxtbooks/aas/st_201605
https://www.nxtbook.com/nxtbooks/aas/st_201604
https://www.nxtbook.com/nxtbooks/aas/st_201603
https://www.nxtbook.com/nxtbooks/aas/st_201602
https://www.nxtbook.com/nxtbooks/aas/st_201601
https://www.nxtbook.com/nxtbooks/aas/st_201512
https://www.nxtbook.com/nxtbooks/aas/st_201511
https://www.nxtbook.com/nxtbooks/aas/st_201510
https://www.nxtbook.com/nxtbooks/aas/st_201509
https://www.nxtbook.com/nxtbooks/aas/st_201508
https://www.nxtbook.com/nxtbooks/aas/st_201507
https://www.nxtbook.com/nxtbooks/aas/st_201506
https://www.nxtbook.com/nxtbooks/aas/st_201505
https://www.nxtbook.com/nxtbooks/aas/st_201504
https://www.nxtbook.com/nxtbooks/aas/st_201503
https://www.nxtbook.com/nxtbooks/aas/st_201502
https://www.nxtbook.com/nxtbooks/aas/st_201501
https://www.nxtbook.com/nxtbooks/aas/st_201412
https://www.nxtbook.com/nxtbooks/aas/st_201411
https://www.nxtbook.com/nxtbooks/aas/st_201410
https://www.nxtbook.com/nxtbooks/aas/st_201409
https://www.nxtbook.com/nxtbooks/aas/st_201408
https://www.nxtbook.com/nxtbooks/aas/st_201407
https://www.nxtbook.com/nxtbooks/aas/st_201406
https://www.nxtbook.com/nxtbooks/aas/st_mars
https://www.nxtbook.com/nxtbooks/aas/st_201405
https://www.nxtbook.com/nxtbooks/aas/st_201404
https://www.nxtbook.com/nxtbooks/aas/st_201403
https://www.nxtbook.com/nxtbooks/aas/st_201402
https://www.nxtbook.com/nxtbooks/aas/st_201401
https://www.nxtbook.com/nxtbooks/aas/st_201312
https://www.nxtbook.com/nxtbooks/aas/st_201311
https://www.nxtbook.com/nxtbooks/aas/st_201310
https://www.nxtbook.com/nxtbooks/aas/st_201309
https://www.nxtbook.com/nxtbooks/aas/st_201308
https://www.nxtbook.com/nxtbooks/aas/st_201307
https://www.nxtbook.com/nxtbooks/aas/st_201306
https://www.nxtbook.com/nxtbooks/aas/st_201305
https://www.nxtbook.com/nxtbooks/aas/st_201304
https://www.nxtbook.com/nxtbooks/aas/st_201303
https://www.nxtbook.com/nxtbooks/aas/st_201302
https://www.nxtbook.com/nxtbooks/aas/st_201301
https://www.nxtbook.com/nxtbooks/aas/st_201212
https://www.nxtbook.com/nxtbooks/aas/st_201211
https://www.nxtbook.com/nxtbooks/aas/st_201210
https://www.nxtbook.com/nxtbooks/aas/st_201209
https://www.nxtbook.com/nxtbooks/aas/st_201208
https://www.nxtbook.com/nxtbooks/aas/st_201207
https://www.nxtbook.com/nxtbooks/aas/st_201206
https://www.nxtbook.com/nxtbooks/aas/st_201205
https://www.nxtbook.com/nxtbooks/aas/st_201204
https://www.nxtbook.com/nxtbooks/aas/st_201203
https://www.nxtbook.com/nxtbooks/aas/st_201202
https://www.nxtbook.com/nxtbooks/aas/st_201201
https://www.nxtbook.com/nxtbooks/aas/st_201112
https://www.nxtbook.com/nxtbooks/aas/st_201111
https://www.nxtbook.com/nxtbooks/aas/st_201110
https://www.nxtbook.com/nxtbooks/aas/st_201109
https://www.nxtbook.com/nxtbooks/aas/st_201108
https://www.nxtbook.com/nxtbooks/aas/st_201107
https://www.nxtbook.com/nxtbooks/aas/st_201106
https://www.nxtbook.com/nxtbooks/aas/st_201105
https://www.nxtbook.com/nxtbooks/aas/st_201104
https://www.nxtbook.com/nxtbooks/aas/st_201103
https://www.nxtbook.com/nxtbooks/aas/st_201102
https://www.nxtbook.com/nxtbooks/aas/st_201101
https://www.nxtbook.com/nxtbooks/aas/st_201012
https://www.nxtbook.com/nxtbooks/aas/st_201011
https://www.nxtbook.com/nxtbooks/aas/st_201010
https://www.nxtbook.com/nxtbooks/aas/st_201009
https://www.nxtbook.com/nxtbooks/aas/st_201008
https://www.nxtbook.com/nxtbooks/aas/st_201007
https://www.nxtbook.com/nxtbooks/aas/st_201006
https://www.nxtbook.com/nxtbooks/aas/st_201005
https://www.nxtbook.com/nxtbooks/aas/st_201004
https://www.nxtbook.com/nxtbooks/aas/st_201003
https://www.nxtbook.com/nxtbooks/aas/st_201002
https://www.nxtbook.com/nxtbooks/aas/st_201001
https://www.nxtbookmedia.com