scholarly journals Optimum trajectories for an Earth–asteroid–Earth mission with a high thrust flight

2019 ◽  
Vol 484 (2) ◽  
pp. 161-166
Author(s):  
V. V. Ivashkin ◽  
Anqi Lang
Keyword(s):  
Space Mission ◽  
Conjugate Functions ◽  
Launch Vehicles ◽  
Earth Space ◽  
Earth Asteroid ◽  
Second Stage ◽  
The Earth ◽  
Optimum Trajectories ◽  
Upper Stage ◽  
High Thrust

The trajectories of a mission to an asteroid with the presence of a spacecraft (SC) near the asteroid for some time and including a return to the Earth have been studied. A two-stage method of constructing optimum (with respect to the maximum of the useful SC mass) interplanetary trajectories of an Earth–asteroid–Earth mission with high thrust engines has been developed: in the central Newtonian field of the Sun’s attraction at the first stage and with allowance for disturbances at the second stage. An algorithm of constructing conjugate functions for the case of maximizing the useful mass has been designed. The optimum trajectories for the Earth-Apophis-Earth mission have been constructed and analyzed. The possibility in principle of organizing the Earth-Apophis-Earth space mission based on the "Soyuz" and "Zenit" launch vehicles and "Fregat" upper stage for a flight has been demonstrated.

scholarly journals Unusual asteroid 2020 SO: astrometric investigation of the American rocket booster that returned to near-Earth space

2021 ◽  
Vol 2103 (1) ◽  
pp. 012027
Author(s):  
S N Petrova ◽  
A V Devyatkin ◽  
D L Gorshanov ◽  
V N L’vov ◽  
S A Rusov
Keyword(s):  
Orbital Evolution ◽  
Pulkovo Observatory ◽  
Earth Space ◽  
Near Earth Space ◽  
The Earth ◽  
Upper Stage

Abstract In the frame of this study astrometric observations of an unusual object 2020 SO - a newly discovered asteroid that turned out to be a Centaur upper-stage booster from 1960s - during its two close approaches to the Earth in December, 2020 and February, 2021 were carried out using two telescopes of Pulkovo observatory. The orbit of the object in question was determined and its future orbital evolution was modelled.

Low cost liquid upper stage for small launch vehicles

1994 ◽  
Author(s):  
Daniel Moser ◽  
Scott Frazier
Keyword(s):  
Low Cost ◽  
Launch Vehicles ◽  
Upper Stage

scholarly journals NSF Grant: AGU and Partners Aim at Gender Issues in Geosciences

Eos ◽  
2017 ◽  
Author(s):  
Billy Williams
Keyword(s):  
Sexual Harassment ◽  
Gender Equity ◽  
Gender Issues ◽  
Environmental Sciences ◽  
Earth Space ◽  
The Earth

Funding through July 2021 supports a project in the Earth, space, and environmental sciences to promote gender equity and train scientists to recognize and counteract sexual harassment.

Launch Vehicles of the Future: Earth to Near-Earth Space

1990 ◽  
Vol 123 ◽  
pp. 347-354
Author(s):  
G. A. Keyworth
Keyword(s):  
Space Shuttle ◽  
Hubble Space Telescope ◽  
National Policy ◽  
Launch Vehicles ◽  
Space Telescope ◽  
Earth Space ◽  
Near Earth Space ◽  
Space Launch ◽  
The Future ◽  
The U.S

None of us thought, when this colloquium was scheduled, that the timing would enable it to become a celebration as well. The launch, after years of postponements, of the Hubble Space Telescope, has cast a galactic glow over the proceedings here this week. But at the same time, the frustrating delays caused by the collapse in 1986 and very slow regeneration of the U.S. space launch capabilities since then make this discussion of near-earth access very pointed.As we know, the sheer momentum of the U.S. Space Shuttle Program has dominated our perceptions of space launch for a decade and a half. It reached its peak in the early 1980s when our national policy placed nearly total reliance on the Shuttle as our means of access to space. It was a policy doomed to fail, for obvious and not-so-obvious reasons.

“A Life Worthy of Being Called Human”

2019 ◽  
Vol 41 (4) ◽  
pp. 319-332
Author(s):  
Catherine Larrère ◽  
Keyword(s):  
Sustainable Development ◽  
Human Life ◽  
Environmental Ethic ◽  
Future Generations ◽  
Human Beings ◽  
Second Stage ◽  
Making Sense ◽  
The Earth ◽  
Life On Earth ◽  
Ecological Transition

“Act so that the effects of your action are compatible with the permanence of genuine human life on Earth.” How can we understand Jonas’ “maxim”? Is it too anthropocentric to be of any interest for an environmental ethic? Is is too limited to survival to have a moral signification in a truly human ethic? One can argue first that it is not so much anti-Kantian than that it challenges the current prevailing “presentism” and obliges us to take into consideration not only future generations, but also the context in which one anticipates these future generations to be living. Therefore, we can distinguish two different interpretations of Jonas’ maxim: in a first stage, that of sustainable development, it was understood as taking into consideration not only the needs but also the rights of future generations; in a second stage, that of an Anthropocene and ecological transition, it means that making sense of humanity implies connecting human beings to the Earth and other living beings far from opposing them.

Sign in / Sign up

Export Citation Format

Share Document