# Recent content by cjackson

1. ### Stargazing Assessment of astronomical numbers like those of Proxima Centauri

Yes. But I want to know if the sizes are to scale and if those planets could fit between Earth and Moon.
2. ### Stargazing Assessment of astronomical numbers like those of Proxima Centauri

My point is wanting to know the accuracy of the numbers in the op.
3. ### Stargazing Assessment of astronomical numbers like those of Proxima Centauri

Proxima Centauri is 4.2 light years away. That is 24,673,274,438,400 miles. Going at the speed of the Sun through the Milky Way, 492,150 miles per hour, it would take 5,723 years to get there. In 100 years the Sun has only gone 431,123,400,000 miles, or 7 percent of 1 light year...
4. ### What is the largest an animal can be?

I know the blue whale is the largest known animal to have existed on Earth, but can animals conceivably grow larger, or is that pretty much the largest animal you can expect to find in the universe?
5. ### How do I factor polynomials?

How do I factor monomials, binomials, trinomials and quadratic equations? Here are some more examples from the book. 24x^3y^2-20x^2y^2+16xy^2 x^2+5x+6 3y^2+8y+4
6. ### How do I factor polynomials?

It's straight from the book.
7. ### How do I factor polynomials?

I'm in desperate need of help with factoring. Basically, how do you do it? Below is an example of what I'm up against. 54c^2d^5e^3; 81d^3e^2 It wants me to find the greatest common factor. http://www.rempub.com/80-activities-...algebra-easier That is the book I'm working out of.
8. ### Getting to Habitable Exoplanets

According to Wikipedia, there could be as many as 11 billion planets in the habitable zone of sun-like stars, with the closest potentially 12 light years away. That number goes up to 40 billion if you include red dwarfs. How would we even go about getting to the nearest Exoearth?
9. ### Macroscopic Objects at Relativistic Speed

How much greater would the energy requirement be than what humanity has ever generated up to this point? Something like that.
10. ### Macroscopic Objects at Relativistic Speed

I have no physics background.
11. ### Macroscopic Objects at Relativistic Speed

I have no idea.
12. ### Macroscopic Objects at Relativistic Speed

Frankly, I don't know how.
13. ### Macroscopic Objects at Relativistic Speed

How much energy would be required to accelerate something the size of the space station to the same speed as protons colliding at the LHC?
14. ### Is there an unseen part of the universe older than the known universe?

The best theories have the universe arising from a singularity 13.8 billion years ago, and have it expanding, becoming increasingly dilute and frigid for eternity. Do you think the Copernican principle holds for the universe and that we inhabit a small part of a vaster cosmos permanently beyond...
15. ### Please recommend pop sci books

I finished Rees' Before the Beginning and am now reading The Shadows of Creation. At what point should I get out of the popular books and into text books?