Latin influence in English entered English, or in what form. Some words have come into English from Latin more than once, through French or another Romance language at one time and directly from Latin at another. Thus we have pairs like fragile/frail, army/armada, corona/crown, ratio/reason, and rotund/round. The first word in each pair came directly from Latin, while the second entered English from French (or Spanish, in the case of "armada"). In addition, some words have entered English twice from French, with the result that they have the same source, but different pronunciations reflecting changing pronunciation in French, for example chief/chef (the former a
Halo orbit Halo orbit A halo orbit is a periodic, three-dimensional orbit near the L, L or L Lagrange points in the three-body problem of orbital mechanics. Although the Lagrange point is just a point in empty space, its peculiar characteristic is that it can be orbited. Halo orbits can be thought of as resulting from an interaction between the gravitational pull of the two planetary bodies and the Coriolis and centrifugal accelerations on a spacecraft. Halo orbits exist in any three-body system, e.g. the Sun–Earth system and the Earth–Moon system. Continuous "families" of both Northern and Southern halo orbits exist at