Question

A 2021 study by Siraj and Loeb used the discovery of Borisov to infer that the majority of objects in this region are ISOs. This is the more distant of two regions that were meant to be observed by the proposed Whipple mission. To explain why this region would not have dissipated, (10[2])an inner portion of it was proposed (-5[1])by and named for Jack (10[1])G. Hills. (10[1])The galactic (10[1])tide strongly perturbs objects in this region. (10[4])A discredited theory (10[1])posited that a red or brown dwarf from (10[1])this region named (10[1])Nemesis (10[3])was responsible (10[1]-5[1])for mass (10[2]-5[1])extinctions (10[2]-5[1])on (-5[1])Earth. (10[1]-5[1])Sedna may be from this region, (10[1])whose spherical shape (10[1])is suggested (10[1])by the (10[1])random (10[1])orbital inclinations (10[3])of the long-period comets (10[1])that originate from (10[1])it. (10[2]-5[1])For 10 points, the outer boundary of the Solar (10[1])System (10[1])is defined by what (10[1])hypothetical region named for a Dutch astronomer? (10[2])■END■ (10[4]0[1])

ANSWER: Oort cloud [or Öpik–Oort cloud; accept inner Oort cloud; prompt on Hills cloud until read]
<Other Science>
= Average correct buzz position

Buzzes

PlayerTeamOpponentBuzz PositionValue
Ethan StrombeckStanford AStanford B5110
David BassJohns HopkinsColumbia C5110
Arjun GonuguntlaBerkeley CBerkeley A58-5
Kai MadgwickDurham AImperial B6310
Rohan ShelkeBerkeley BStanford C6510
Mitchell IndekMichigan CMichigan B6710
Joseph Chambers (DII)Virginia A (UG)GWU B (Grad)7410
Emmett Bicknell (DII)CedarvilleKenyon7410
Forrest Weintraub (UG)Columbia ARowan7410
Freddy PottsSheffieldKCL7410
Enoch YuenImperial AEdinburgh7710
Rasheeq Azad (UG)UNC B (UG)Duke A (UG)8510
Davin SivertsonAlabamaVanderbilt A8810
Mitchell ShaddenTexas ASorbonne8910
Jacob RobertsonOxford AWarwick8910
Andrew KelleyKentuckyGeodesic8910
Cade ReinbergerRIT BBinghamton91-5
Brendan BethlehemCambridge BCambridge A9110
Jerry VinokurovJohn JayVassar9310
Zaid Asif (DII)NYU BPenn93-5
Blake EnwillerVanderbilt BMTSU9310
Karthik PrasadCornell BCornell A94-5
Benjamin McAvoy-Bickford (DII)UNC A (Grad)Maryland B (UG)9410
Jeffery Austin (DII)UNC D (DII)Virginia B (UG)9410
Dimitris KalafatisTexas A&M BUW A95-5
Andrew HarmsMichigan State AAppalachian State9610
Seth WebbTexas A&M AIowa B96-5
Rose ConwayCambridge COxford C10210
Michael Eng (UG)UNC C (UG)Liberty B (DII)10510
Ian DewanKielBristol10710
Kathy LiangRice AIowa A10910
Akshay SeetharamClaremont AUBC A11010
Arjun Bothra (UG)HaverfordNYU A11210
Sanjay SrihariGeorgia Tech AGeorgia Tech B11210
Kyle SaelzlerHardingSouth Carolina11210
Calvin Bostleman (DII)Ohio State AMichigan A11610
Ella WardeOxford BDurham B11910
Danny CutbillRIT ACornell C12010
Andy Yu (DII)Maryland A (Grad)JMU B (UG)12010
Meredie Cohen (DII)William & Mary A (UG)Virginia C (UG)120-5
Ethan Cohen (UG)GWU A (UG)Maryland C (DII)12910
Jonathan Bost (UG)Liberty A (Grad)Liberty C (DII)13010
Anirudh Bharadwaj (DII)PennNYU B13410
Swapnil GargBerkeley ABerkeley C14110
Aleks Kozlowski (DII)Roanoke College A (DII)JMU A (UG)14110
Sophie EttingerBinghamtonRIT B14210
Raymond WangCornell ACornell B14210
Zander Werner (DII)Virginia C (UG)William & Mary A (UG)14210
Sophie HiggsUW ATexas A&M B14210
Anwitha VempaliIowa BTexas A&M A1420