Lifetime of Earth: Planet vs Sun

  • Thread starter Thread starter mersecske
  • Start date Start date
  • Tags Tags
    Earth Lifetime
AI Thread Summary
The discussion centers on the lifespan of solid planets in relation to their stars, particularly focusing on the Sun's lifecycle. It highlights that unless a planet experiences a catastrophic event, such as a mega-collision or significant tidal drag, it can survive until the Sun enters its red-giant phase and eventually becomes a white dwarf. Larger stars may go supernova, potentially impacting nearby planets, but if they survive, those planets can continue to orbit the stellar remnant. The conversation also touches on the probability of planets existing around various stars in the galaxy, emphasizing that planets can exist indefinitely without self-dissipation. Overall, the longevity of planets is largely independent of their star's lifecycle, barring extreme cosmic events.
mersecske
Messages
186
Reaction score
0
What is the liftime of a solid planet compared to the life of its sun?
 
Astronomy news on Phys.org
IIRC, unless it is subject to a mega-collision, or spirals into sun due tidal drag, the next 'planet killer' is the star's red-giant phase. The Sun will then shrink to a white dwarf. Loss of mass may cause an orbit shift, but not cast planet into deep space. If the star is somewhat larger than our Sun, it will go supernova, which may zap the planet. If planet survives that, it should just orbit the stellar remnant until heat-death...
 
I mean, let's assume that we see a star on the sky (we don't know its color).
And we suppose that planets are around that star, if it is possible.
But what is the possibility that planets are around that star at this moment?
So the sun isn't to young or old?

b) And what is the same probability for any star in the galaxy,
independent of the fact that we can see or not?
 
mersecske said:
suppose that planets are around that star
what is the possibility that planets are around that star

What? This makes no sense, and I really don't know what you're asking.

A planet can exist indefinitely -- there are no forces which will ever cause it to dissipate or otherwise disrupt itself.
 

Thread 'Potential biosignature found in Mars rock'

Publication: Redox-driven mineral and organic associations in Jezero Crater, Mars Article: NASA Says Mars Rover Discovered Potential Biosignature Last Year Press conference The ~100 authors don't find a good way this could have formed without life, but also can't rule it out. Now that they have shared their findings with the larger community someone else might find an explanation - or maybe it was actually made by life.
View full post »

Thread 'Does it make sense to build new radio telescopes?'

TL;DR Summary: In 3 years, the Square Kilometre Array (SKA) telescope (or rather, a system of telescopes) should be put into operation. In case of failure to detect alien signals, it will further expand the radius of the so-called silence (or rather, radio silence) of the Universe. Is there any sense in this or is blissful ignorance better? In 3 years, the Square Kilometre Array (SKA) telescope (or rather, a system of telescopes) should be put into operation. In case of failure to detect...
View full post »
Thread 'Could gamma-ray bursts have an intragalactic origin?'

Thread 'Could gamma-ray bursts have an intragalactic origin?'

This is indirectly evidenced by a map of the distribution of gamma-ray bursts in the night sky, made in the form of an elongated globe. And also the weakening of gamma radiation by the disk and the center of the Milky Way, which leads to anisotropy in the possibilities of observing gamma-ray bursts. My line of reasoning is as follows: 1. Gamma radiation should be absorbed to some extent by dust and other components of the interstellar medium. As a result, with an extragalactic origin, fewer...
View full post »

Similar threads

B Does Time Pass at Different Rates on Other Planets?
Replies
19
Views
266
B Terminology for motion in the solar system, ecliptic maybe?
Replies
13
Views
2K
I New Developments In The Search For Planet X
Replies
2
Views
3K
B How Does a Massive Planet's Orbit Around the Sun Appear?
Replies
6
Views
2K
I A New Idea for the Origin of Earth's Water
Replies
1
Views
2K
B What is the difference between a rocky planet's core and the Sun's core
Replies
5
Views
1K
I How Big of an Object Orbiting Closer to the Sun Than Earth Could Be Overlooked?
Replies
17
Views
3K
I Could life on Earth survive the far future?
Replies
16
Views
3K
B When Would Planets Go Dark if the Sun Went Out?
Replies
2
Views
2K
B Quasi-Moons
Replies
0
Views
2K

Hot Threads

Recent Insights

Back
Top