/ http://www.slideshare.net/images/logo.gif / �ݺ�ߣShare feed for �ݺ�ߣshows by User: xr0038 https://cdn.slidesharecdn.com/profile-photo-xr0038-48x48.jpg?cb=1704425082 My name is ��� �� (OHSAWA Ryou) An astronomer. http:/d.hatena.ne.jp/xr0038/