サバイバルゲーム開催情報 - コメントへの返信
toms skor
- 投稿者: ゲスト 投稿日時: 2015/7/1 23:00:30
- Marco Rubio, R Fla., a prospective 2016 presidential candidate, said in an interview Friday that attacking their supply lines, command and control centers and economic assets inside Syria "is at the crux of the decision" for Obama. The risk of "getting sucked into a new war" is outweighed, he said, by the risk of inaction.To hit back at the group, Obama's has stressed military assistance to Iraq and efforts to create a new, inclusive government in Baghdad that can persuade Sunnis to leave the insurgency.Traditionally, solar sails make use for the momentum carried by photons of electromagnetic radiation from the Sun. Using a huge canopy of ultra lightweight (but robust) material, the sail experiences a force from the incident sunlight. Some advanced concepts also theorized the use of planetary lasers to propel solar sail powered spacecraft from A to B. Opting for solar propulsion would be the ultimate energy conservation method yet, optimizing payload transportation, maximizing fuel efficiency. Make a solar sail big enough, steady momentum can be transferred from the solar photons, accelerating the spacecraft. There are of course many hurdles to this design, but prototypes have been built (although many failed to make it into space due to rocket launch failures).