Teble I hopcrries of exr'nsorarplanets X and y. Note: Msisrhe mass of theEarrh (5.974x 102{kg).

Plrrct MasdMg Radius of stertsorbit frem rentrcof mrss of tbeeystcm&m

Oriert*ion ofthe syrtem

xY

2xlOa

2xtor(i) Determine rhe orbiar radius for each exrrasorar planer x and y. you

should state your answer in asrronomical unis (iU).

l2

t50

face-on

edge-on

(ii) For each of ttre prands X and y identis an extrarorar praner detectiontechnique that woutd be (a) appropriate and (b) inappropriate. ln eachcase your answer should incrude a biefexpranation for your choicc,identi$ing auy factors that might affect the ch&ce of successfurdetection.

(b) Meteorites collected in Antarctica povide one of the prirnary sets of sarnplesfrom other bodies in our sorar system that are avairable for scienti;-il.J,rdyin deail in the laboratory. specimens arc collected under cqrditions thar are'intended to rodrrce the risk of c.ontamination of the nfreorite ftom lerreskiarmaterials, though the rneteorites therrserves may have bcen on Earth forthousands ofyean either trapped in the icc or elrposd on the ice's surface.Table 2 lists the chemicar shrcrure$ and carbon t*,op,. corporiaon oitt torganic compounds A{ extractd from a carbonaceo's choodfite f€covercdfrom Antarctica and a cartonate mineral isorated from the same meteorite,

Table 2 chernical stnrctures and carbon isotopic conpositions for usc withQuesticn l(b).

Compoond Structure 6Fc/t

.-tiTTTTTT -''"-!-.,1-!-f-f -f-f -f -*HHHHHHHIT

OH

HrC

cH*o,/\Ho-cH bH-ox\/CH-CH/\HO OH

+20

c olt

H?N-fH-c-()HCHrt-tH-cH3CH:

+40

carbonate mineral not known +5