%0 Journal Article %T The flatness of the Universe is robust %A Matts Roos %A S. M. Harun-or-Rashid %J Physics %D 2000 %I arXiv %X We combine the two balloon experiments BOOMERANG and MAXIMA-1 with our previous fit which used 9 constraints and concluded that the Universe is flat. The result is that the flatness is robust, $\Omega_0 = 0.97 \pm 0.05$. %U http://arxiv.org/abs/astro-ph/0005541v2