Sure! Here are the definitions for the 50 words you provided:
1. Stagnant: Not flowing or moving; inactive or sluggish.
2. Laser: A device that emits a narrow and intense beam of light.
3. Angioplasty: A medical procedure to widen narrowed or blocked blood vessels.
4. Mayans: An ancient civilization in Mesoamerica known for their advanced culture and achievements.
5. Programmable pacemakers: Pacemakers that can be adjusted or programmed to regulate heart rhythms.
6. Egyptians (Kemet): Ancient civilization in Northeast Africa known for its rich history and cultural achievements.
7. Breast cancer detection: The identification and diagnosis of breast cancer.
8. Mesopotamians: People who lived in the historical region of Mesopotamia, known for their contributions to civilization.
9. SpaceX: Private aerospace manufacturer and space transportation company founded by Elon Musk.
10. International Space Station (ISS): A habitable space station in low Earth orbit for international collaboration in space exploration.
11. Aerospace: The branch of technology and industry related to aviation, spaceflight, and spacecraft.
12. Space tourism: Tourism in which people travel to space for recreational purposes.
13. NASA: National Aeronautics and Space Administration, the United States' space agency.
14. Interplanetary: Relating to travel or existence between planets.
15. Species: A group of living organisms capable of interbreeding and producing fertile offspring.
16. Planetary theory: The scientific explanation of the formation, evolution, and characteristics of planets.
17. Astrological events: Celestial phenomena and alignments studied and interpreted in astrology.
18. "Advanced at an exponential rate": Progressed rapidly and significantly, increasing at an exponential pace.
19. Mars: The fourth planet from the Sun, known for its potential for human exploration and colonization.
20. Exoplanets: Planets that orbit stars outside our solar system.
21. Dwarf planets: Celestial bodies that resemble planets but have not cleared their orbits of other debris.
22. Enceladus: One of Saturn's moons known for its subsurface ocean and potential for harboring life.
23. Saturn: The sixth planet from the Sun, recognized for its distinctive rings.
24. Gravity: The force that attracts objects toward each other, dependent on mass and distance.
25. Exomedicine: The study of medical conditions and treatments in space.
26. Microgravity: A condition experienced in space where gravitational forces are significantly reduced.
27. "Microgravity has an effect on a molecular level": Microgravity impacts molecular processes and interactions.
28. Solar energy: Energy derived from the sun's radiation, harnessed for various applications.
29. International collaboration: Cooperation and joint efforts between countries on a global scale.
30. Chinese National Space Administration (CNSA): China's national space agency responsible for space exploration.
31. European Space Agency (ESA): An intergovernmental organization dedicated to space exploration and research in Europe.
32. Lunar base: A human settlement or station established on the Moon.
33. Borderless frontier: An area or domain without geographical or political boundaries.
34. "Highest quality scientific collaboration": Exemplary and outstanding cooperation among scientists and researchers.
35. Political tension: Strained relations or conflicts arising from political differences.
36. Humanity: The human race as a whole; the collective characteristics and qualities of human beings.
37. Ethics: Moral principles and values that guide human behavior and decision-making.
38. Exploit: To make full use of or derive benefit from something or someone.
39. Millennia: Plural of millennium, a period of one thousand years.
I hope these definitions help! Let me know if you have any further questions.