850 reputation
115
bio website
location Santa Ana, CA
age 54
visits member for 4 months
seen 14 hours ago

2d
reviewed No Action Needed seasons elongating and shortening
2d
reviewed No Action Needed Can we hear something on Venus, Mars and Titan?
2d
reviewed No Action Needed How are the speed, distance and time of India's MOM and USA's Maven Mars missions calculated?
Jul
23
reviewed Close Are these facts about moon true?
Jul
20
reviewed No Action Needed Quasars and SMBH
Jul
16
reviewed Close is there any theory or observational evidence that our universe is electrically neutral or not?
Jul
8
reviewed No Action Needed How can I accurately find & apply the white donut to the center of my mirror?
Jul
7
comment Rate of star collpse
I am looking for how fast the rate of fission changes from being capable of maintaining the sun radius at 1 AU and when the sun collapses to a nova. How do you determine when the fuel is spent? Since the nuclear reactions are diffuse, the only way a star would collapse is when the rate slow significantly.
Jul
6
asked Rate of star collpse
Jul
6
comment Burning Out Stars
@Joan.bdm Your answer is a little simplistic, but in the larger stars, nickel and iron can fuse to make heavier elements. Unfortunately, the fusion produces less energy then the silicon fusion. Since less energy is produced, gravity eventually collapses the star. With a catastrophic collapse, the core can produce very heavy elements (maybe even as high as 118) with an explosion of energy (a nova or supernova).
Jul
6
reviewed No Action Needed How did Kepler determine the orbital period of Mars?
Jul
5
comment Sun path at poles
@SabreWolfy The youtube video was done at a location just north of the Arctic Circle. If it was taken at the North Pole (1) there would be no land (2) the sun would be at nearly the same elevation throughout the entire day.
Jul
5
reviewed No Action Needed Finding the radius of an eccentric orbit at any point
Jul
4
reviewed Reviewed Can I look at the sky and find the day of the week?
Jul
4
comment Can I look at the sky and find the day of the week?
Although this is interesting, it doesn't directly answer the question.
Jul
4
reviewed Leave Open Help in determining the features of an unusual, fictional star system
Jul
4
reviewed Close Was the progress of astronomy in the 1800s surprisingly slow, and if so why?
Jul
4
reviewed Close what will be the exact position of the Thirty Meter Telescope
Jun
30
reviewed No Action Needed What are the objects that are visible from a city?
Jun
30
reviewed Leave Open Help in determining the features of an unusual, fictional star system