HELSINKI — Chinese rocket startup Orienspace is moving towards a debut launch from a sea platform in the. The Gravity-1 rocket will launch from a mobile sea platform developed as part of sea launch facilities developed at Haiyang in Shandong province during the second half of 2023, CEO Yao Song said in a mid-April meeting with provincial government leaders. Earlier announcements point to a fourth quarter launch. Orienspace has already secured orders for the launch of hundreds of satellites and been shortlisted in plans for a number of satellite constellations, Yao stated. Gravity-1 consists of three solid stages and four…