Recent content by Helio

See, that's why your such a great moderator! :) But love has many interests. ;) And it also hopes for a return. So I'll stay optimistic for a brighter forum future. Perhaps something will stir the public enough to get folks engaged enough to support a forum such as this. Also, I did notice...

Perhaps a song would be appropriate.... View: https://youtu.be/l7BtqvnKJEY

Musk might be the better shot at it, so instead of having an ex-Space.com (formus), it might be something close to SpaceX.com. He might buy it just for this quip. ;) Also, COLGeek, I assume each blog will allow conversations. Is this correct?

The data shows < 0.2% of G-type stars have exoplanets that are both earth-sized and in their HZ. This number could increase as many exoplanets still have unknown radii. So if G-type stars are about 10% of all stars, then we have < 0.02% of all stars have exoplanets in their HZ. Of course, K...

I'll have to look at spaceport. Thanks My astronomical heart was rekindled when the Bad Astronomy board became active. It merged with Universe Today and now it is the Cosmoquest Forum. What other astronomy forums are out there?

Dang! Sad news!😔 I’ve greatly enjoyed the comradely and regret seeing this fun and informative forum end. Thanks to all the moderators for their efforts. George

I suppose it is odd that it's so massive relative to the small size of the star, but binary systems are very common. The inward migration of planets is likely the mainstream view. This larger planet formed farther out then migrated inward. Its orbital speed is faster than the spin of the...

Here's another way to present the HZ (Habitable Zone) planets. This shows how many of three different size ranges (too small, too large, just right) and their relative position in the HZ with bright green being in the more likely (conservative) zone.

Thanks contrarian. I see that the orbital period of the planet is about 1/2 the star’s rotation rate. Therefore, if the rates are correct, this planet will be found to be migrating inward and may be close to the Roche limit. ChatGPT crunched the numbers and found it is 2.4x farther out from...

What two planets prompted this question?

Thanks Cat. Zero has had a twisted history and it seems many like to keep twisting. ;) An easy way to think of zero is from a physical representation of say, apples. If I have an apple in my right hand I have 1 apple in that hand. If the other hand had no apple then it has 0 apples. Zero...

Astronomers have reached 7500 in the number of exoplanet discoveries. This is from exoplanet.eu, which, admittedly, takes in almost all bodies orbiting a star. Thus objects 60x, or more, the size of Jupiter are admitted, unlike NASA which doesn't include very large bodies. Here's a summary...

“…and we have w = c - v. The velocity of propagation of a ray of light relative to the carriage thus comes out smaller than c. But this result comes into conflict with the principle of relativity set forth in Section 5." This variable speed, as Einstein knows, is introduced by him to take us...

Yes. That is essentially a law in Relativity. This was the original view of the speed of neutrinos. But from Dr. Davis, and lots of Clorox (so to speak), he discovered, that neutrinos can change from one type to another, of the three known types. IIRC. Thus, for this to happen, they are...

Do black holes exist? None have ever been observed, right?