Bārnarda zvaigzne

Bārnarda zvaigzne
Bārnarda zvaigznes attēlojums 2006. gadā
Citi nosaukumi: Bārnarda lidojošā zvaigzne,[1]
Čūskneša Proksima
Zvaigznājs: Čūsknesis
Rektascensija: 17h 57m 48,5s
Deklinācija: +0,4° 41′ 36″
Redzamais spožums: 9,5
Absolūtais spožums: 13,26
Masa: 0,17 M☉

Bārnarda zvaigzne ir ļoti mazas masas sarkanā pundura tipa zvaigzne, kas atrodas aptuveni 6 gaismas gadu (otra tuvākā zvaigzne Saulei aiz Centaura Alfas) attālumā no Zemes Čūskneša zvaigznājā. 1916. gadā amerikāņu astronoms Edvards Emersons Bārnards izmērīja šīs zvaigznes kustību debesjumā, kas bija 10,3 leņķa sekundes gadā. Tas ir lielākais zināmais zvaigznes ātrums pie debesīm, skatoties no Saules sistēmas.

2018. gada novembrī tika ziņots, ka ap Bārnarda zvaigzni tika atklāta riņķojam citplanēta, kurai tika dots nosaukums Bārnarda zvaigzne b. Tā kā planētas masa 3 reizes pārsniedz Zemes masu, tā tiek klasificēta kā “superzeme” (Super-Earth) un pašlaik skaitās kā otra tuvākā citplanēta (aiz Centaura Proksimas b) Saules sistēmai.[2]

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Atsauces

  1. ↑ Aizeks Azimovs. Visums. R:, "Zinātne", 1972, 41. lpp
  2. ↑ Andris Kraševskis. «Tikai 6 gaismas gadu attālumā no Zemes atklāta ledus klāta superzeme». atklajumi.lv. Atklājumi.lv, 2018. gada 17. decembris. Skatīts: 2019. gada 11. jūlijs.

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