Xigashada Sawirka, Bogga ugu weyn Xigashada Sawirka, Bogga ugu weyn San Francisco State University iyo Xarunta Harvard-Smithsonian ee Astrophysics waxay si madax-bannaan u soo gabagabeeyeen in saddexda meerayaal ee ugu fiican ay ku habboon yihiin xogta. Labada meerayaal ee cusub waxaa loo magacaabay Upsilon Andromedae c iyo Upsilon Andromedae d. Su'aal: Sannadkee ayaa la ogaaday in saddexda meerayaal ee ugu fiican ay yihiin macluumaadka ku habboon xogta?
Sannadkii 1999