"Tentai Kansoku" (天体観測^?) is the third single by Bump of Chicken. The title track is from the album Jupiter. It is also a soundtrack song from the anime Darker Than Black.

The song is featured in the Sony PSP game Taiko no Tatsujin: Portable DX.

All tracks written by Fujiwara Motoo.

Bump of Chicken (バンプ・オブ・チキン Banpu Obu Chikin) is a rock group from Sakura, Chiba, Japan. Their members are Fujiwara Motoo, Hiroaki Masukawa, Yoshifumi Naoi and Hideo Masu. Since their inception in 1994, they have released fourteen singles and five albums. They are a popular group in Japan; every release since their third single, "Tentai Kansoku," has charted in the top ten on the Oricon Weekly Charts. Their music has been used in various video games and as theme songs for movies and television shows in Japan.

The members first met in kindergarten and were classmates throughout their primary and secondary education. Bump of Chicken's first performance was in 1994, during their ninth grade cultural festival, playing a cover of The Beatles' version of Twist and Shout. In 1996, their song, Danny, won an award on 96TFM.

In 1999, Bump of Chicken released their first album, Flame Vein, on High Line Records. Later that year, they released their first single, "Lamp". In 2000, they released The Living Dead, their final release on High Line. They also held their first live tour, "Tsuaa Pokiiru (ツアーポキール^?)", during March and April.