Akatsuki

I'm sorry. This is the previous homework.

Do you know "Akatsuki" ? Akatsuki is a Japanese satellite which investigating the Venus. It was launched from Tanegashima with H-2A rocket on May 21th. But, it failed the orbital injection. I'll talk about this satellite.

The Venus is very similar to the Earth. For example, the Venus is 0.82 times as heavy as the Earth, and its diameter is also 0.95 times as long as that of the Earth. And, it is thought that the inside structure of the Venus is similar to that of th Earth. Therefore, if the Venus is investigated, the birth of the Earth may be revealed. So, the investigation of the Venus is very important.

To investigate the Venus, Japan launched this satellite, Akatsuki, the official name "PLANET-C". It had cruised on the right track. But, on December 7th, it failed to attain the orbital of the Venus. To attain the orbital, Akatsuki's reverse jet must last for 12 minutes, but this time, it lasted only for a few minutes.

Akatsuki has the next chance to attain the orbital after 6 years. But it made for using 4.5 years. So, it is difficult to complete the next chance. Now, Japan Aerospace Exploration Agency (JAXA) is researching the cause. They succeeded to return "Hayabusa", a satellite to investigate a small planet, from the space miraculously. So, Akatsuki may miraculously succeed the attain the orbital to the Venus after 6 years.