Sentences with phrase «stable planetary orbits»

reduces the likelihood of stable planetary orbits at increasing distances from each star or binary pair (Alan Hale, 1994).

Recent numerical integrations, however, suggest that stable planetary orbits exist: within three AUs (four AUs for retrograde orbits) of either Alpha Centauri A or B in the plane of the binary's orbit; only as far as 0.23 AU for 90 - degree inclined orbits; and beyond 70 AUs for planets circling both stars (Weigert and Holman, 1997).

Not exact matches

Test simulations of the orbits of the three planets around 61 Virginis suggest that the planetary system's orbital configuration is dynamically stable because of low orbital eccentricities for at least 365 million years.

Assuming that the spectroscopic companion B does not preclude a stable inner planetary orbit, the distance from Star A where an Earth - type planet would be «comfortable» with liquid water is centered around only 0.457 AU — between the orbital distances of Mercury and Venus in the Solar System.

However, if the existence of a relatively close, second companion (see Star Bc below) around Bab — with an orbital period of 2.2 to 2.9 years or less — is confirmed, then a planetary orbit in Star Ba's water zone may not be stable over the long run.

In a talk entitled, «A Future Mars Environment for Science and Exploration» given at the recent Planetary Science Vision 2050 Workshop in Washington DC, Green discussed a magnetic shield which would be launched into stable orbit between Mars and the sun at a position known as the Mars L1 Lagrange Point.