The first successful landing of a remote spacecraft on the surface of Mars occurred Group of answer choices In 2001 In the late 1950s In 2021 In the 1970s In the early 1990s
Added by Christopher J.
Step 1
Step 1: Identify the key event in the question, which is the first successful landing of a remote spacecraft on Mars. Show more…
Show all steps
Your feedback will help us improve your experience
Ivan Kochetkov and 69 other Physics 101 Mechanics educators are ready to help you.
Ask a new question
Labs
Want to see this concept in action?
Explore this concept interactively to see how it behaves as you change inputs.
Key Concepts
Recommended Videos
Ivan K.
The Sojourner rover that explored the surface of Mars as part of NASA's Pathfinder mission had to make decisions on its own rather than be driven by remote control from Earth. Why?
Navigating in the Solar System. The Mars Polar Lander spacecraft was launched on January $3,1999 .$ On December $3,1999,$ the day Mars Polar Lander touched down on the Martian surface, the positions of the earth and Mars were given by these coordinates: $$\begin{array}{rlr}{\text { Earth }} & {0.3182 \mathrm{AU}} & {0.9329 \mathrm{AU}} & {0.0000 \mathrm{AU}} \\ {\mathrm{Mars}} & {1.3087 \mathrm{AU}} & {-0.4423 \mathrm{AU}} & {-0.0414 \mathrm{AU}}\end{array}$$ In these coordinates, the sun is at the origin and the plane of the earth's orbit is the $x y-$ plane. The earth passes through the $+x$ -axis once a year on the autumnal equinox, the first day of autumn in the northern hemisphere (on or about September 22$) .$ One AU, or astronomical unit, is equal to $1.496 \times 10^{8} \mathrm{km},$ the average distance from the earth to the sun. (a) In a diagram, show the positions of the sun, the earth, and Mars on December $3,1999 .$ (b) Find the following distances in AU on December $3,1999 :$ (i) from the sun to the earth; (ii) from the sun to Mars; (iii) from the earth to Mars. (c) As seen from the earth, what was the angle between the direction to the sun and the direction to Mars on December 3 . the following distances in $\mathrm{AU}$ on December $3,1999 :$ (i) from the sun to the earth; (ii) from the sun to Mars; (iii) from the earth to Mars. (c) As seen from the earth, what was the angle between the direction to the sun and the direction to Mars on December 3 , 1999$?$ (d) Explain whether Mars was visible from your location at midnight on December $3,1999 .$ (When it is midnight at your location, the sun is on the opposite side of the earth from you.)
Recommended Textbooks
University Physics with Modern Physics
Physics: Principles with Applications
Fundamentals of Physics
Transcript
18,000,000+
Students on Numerade
Trusted by students at 8,000+ universities
Watch the video solution with this free unlock.
EMAIL
PASSWORD