Le Quartier Général

NASA has detected less than 25% of the predicted population of near-Earth asteroids of this size range.
Detection of 2019 OK was complicated by the fact that it is on a highly elliptical orbit and appeared to
not be moving on the plane of sky because of the geometry of the orbit relative to Earth for much of the
month prior to the close approach; the complication of a very dim object in a crowded field of stars and
the lack of motion made it much harder to detect and calculate an orbit until it was quite close.
2019 OK is now inbound to perihelion and will then travel on its orbit to beyond the orbit of Mars before
turning back toward the Sun. It will not pass close by Earth again until the next century, and no
additional passes within the Moon's orbit are currently predicted.

La Nasa vient de dévoiler les deux combinaisons spatiales qui serviront aux astronautes lors du retour sur la Lune en 2024. Elles intègrent des améliorations conséquentes depuis les missions Apollo.

Boudi a écrit : ↑ven. oct. 18, 2019 8:18 am

lles intègrent des améliorations conséquentes depuis les missions Apollo.