For multi-header sheets, you should consider to use
markup="bordered" for better appearance.
<tc:sheet value="#{sheetController.solarList}" var="luminary" rows="11"
columns="3fr 2fr 30px 2fr 2fr 2fr 2fr 2fr 2fr" markup="bordered">
<f:facet name="header">
<tc:out value="Name">
<tc:span row="3"/>
</tc:out>
<tc:out value="Information">
<tc:gridLayoutConstraint columnSpan="2"/>
...
|
Name
|
Information
|
Data
|
Discovery
|
|
|
|
Orbit
|
Orb
|
Name
|
Year
|
|
|
|
of
|
#
|
Distance [1000 km]
|
Period [days]
|
Inclination [°]
|
Eccentricity
|
|
|
|
Sun
|
-
|
-
|
0
|
0.0
|
0.0
|
0.0
|
-
|
|
|
|
Mercury
|
Sun
|
I
|
57910
|
87.97
|
7.0
|
0.21
|
-
|
|
|
|
Venus
|
Sun
|
II
|
108200
|
224.7
|
3.39
|
0.01
|
-
|
|
|
|
Earth
|
Sun
|
III
|
149600
|
365.26
|
0.0
|
0.02
|
-
|
|
|
|
Mars
|
Sun
|
IV
|
227940
|
686.98
|
1.85
|
0.09
|
-
|
|
|
|
Jupiter
|
Sun
|
V
|
778330
|
4332.71
|
1.31
|
0.05
|
-
|
|
|
|
Saturn
|
Sun
|
VI
|
1429400
|
10759.5
|
2.49
|
0.06
|
-
|
|
|
|
Uranus
|
Sun
|
VII
|
2870990
|
30685.0
|
0.77
|
0.05
|
Herschel
|
1781
|
|
|
Neptune
|
Sun
|
VIII
|
4504300
|
60190.0
|
1.77
|
0.01
|
Adams
|
1846
|
|
|
Pluto
|
Sun
|
IX
|
5913520
|
90800.0
|
17.15
|
0.25
|
Tombaugh
|
1930
|
|
|
Moon
|
Earth
|
I
|
384
|
27.32
|
5.14
|
0.05
|
-
|
|
|