Questions tagged [life]

Questions regarding life in the universe, especially the possibility of life outside our planet, or the influence of astronomical forces on life on Earth.

Filter by
Sorted by
Tagged with
2 votes
0 answers
43 views

What would be the noticeable effects (if any) if the Earth's orbit entered a chaotic trajectory?

To set the stage, let's put some more specific assumptions: I am specifically thinking of a binary-single type interaction where the Earth is the intruder on a binary system of two bodies of a ...
user avatar
  • 1,997
1 vote
1 answer
142 views

Calculating "maximum" distance to an alien civilization

I'm planning on making a video related to Fermi Paradox, and I've used Omni Calculator's Alien Civilization calculator as a reference. I noticed they have a field that calculates the "maximum&...
user avatar
3 votes
1 answer
114 views

Most powerful microscope on Mars?

From all the missions sent to the surface of Mars, do any of them have a microscope? If yes, then which one has the most powerful microscope? Is it capable of detecting microbes?
user avatar
  • 479
1 vote
1 answer
100 views

Could life develop in a galaxy with a quasar at its centre?

Quasars are a type of Active Galactic Nucleus that inhabit the centres of some galaxies. They are among the most energetic objects known in the universe, emitting up to a thousand times the energy ...
user avatar
1 vote
2 answers
71 views

Detection of the existence of any extraterrestrial life

We can't see things in "real-time" but we see the "past versions" of the things because it takes time for the light from that object to travel to us. So looking far away means ...
user avatar
  • 113
3 votes
0 answers
46 views

Could the timing of the oxygen spike on Mars be used to determine if photosynthesis is responsible?

I am wondering if the timing of the oxygen spike on Mars could be used to determine if photosynthesis is the source (which would be another indication of life on Mars), or if it is purely heat related?...
user avatar
  • 3,919
4 votes
0 answers
75 views

Has SETI searched the solar system for life?

I know SETI is searching the stars for radio signals emitted by advanced alien civilizations, but has SETI searched inside our solar system - particularly moons, planets, and Lagrange points? I would ...
user avatar
  • 3,919
1 vote
1 answer
74 views

Is life possible on other celestial objects (apart from planets) even theoretically? [closed]

For example, asteroids, comets, stars, heliosphere etc?
user avatar
  • 83
2 votes
0 answers
36 views

Would Atlas Pro's prediction about the color of plant in Kepler-186F work as a biosignature to search for life?

The Atlas Pro video that prompted this question is this. Tl;dr: it is argued that due to the different spectrum of radiation emitted by Kepler-186 and what is known about the evolution of ...
user avatar
9 votes
2 answers
2k views

What is the probability of life having developed or going to develop in our solar system another time?

I'm sorry I am not quite sure this question satisfies this point: Questions that are purely hypothetical, for example a question such as 'Could a black hole destroy the universe' or 'What if our ...
user avatar
  • 199
7 votes
3 answers
3k views

Could rogue planets harbor life?

On July 21 at 10 am, Seti Talks will be discussing the topic of "Could Rogue Planets Harbor Life". Supposedly there are 50 billion such planets in the Milky Way. I would think that the ...
user avatar
  • 1,515
0 votes
3 answers
104 views

How big can a planet get, with respect to its star for it to sustain life? [closed]

Earth is 108 times smaller than the sun in terms of its diameter while Jupiter is 10 times. Assuming Jupiter was located such that it could sustain life, theoretically how big a planet can get with ...
user avatar
19 votes
1 answer
5k views

Serious alternate form of the Drake Equation, or graffiti?

Where I live it is very common to see jackets and T-shirts with familiar yet casually garbled or modified content (example) I recently spotted what looked a lot like the Drake equation on the back of ...
user avatar
  • 31.6k
0 votes
1 answer
151 views

For colonization purposes, what is so good about Titan? [closed]

I have read that Titan is the best candidate for humans to colonize in our Solar System. However it has no water, it's atmosphere is not breathable and it is -290° F on the surface. It doesn't sound ...
user avatar
  • 1,515
5 votes
1 answer
83 views

Is extra-planetary phosphine actually a new discovery?

For all the buzz on Venus’s phosphine, I’m curious as to what sets it apart from the findings of phosphine on Jupiter, Titan, etc. There are several papers on NASA.gov dating to 1979 and more recent ...
user avatar
2 votes
1 answer
74 views

Why is the SETI survey limited to only Red Dwarf Stars?

I was going through the official SETI website, when I came across this article on the same website which said : Today, the SETI Institute uses a specially designed instrument for its SETI efforts – ...
user avatar
3 votes
1 answer
96 views

What other hints of possible life in Venusian atmosphere have we dismissed?

Now that phosphine has probably been discovered in relatively large quantities in the Venusian atmosphere, I heard that there have been other unexplained phenomena (i.e. dark patches) seen. Does ...
user avatar
1 vote
0 answers
65 views

Is there a useful measure of how "life-dominated" a planet is?

If life exists on Mars or Venus, then in contrast to life on Earth, it must be "just scraping by". I can imagine a few ways to quantify this: Life on Mars or Venus is hard to detect -- any ...
user avatar
2 votes
0 answers
51 views

Could life forms have travelled between the Earth and Mars on meteoroids?

Mars meteorites have been found on Earth, and there likely are Earth meteorites that have crashed on Mars. If you take any random piece of rock from the surface of Earth, the odds are there will be ...
user avatar
  • 16.7k
2 votes
0 answers
144 views

On Venus, what substances are likely to be found that are liquid in the temperatures and pressures and are there pools of the stuff?

It's clear that there is no water on Venus. But with temperatures hot enough to boil lead, well, couldn't there be pools of lead on the surface? Or pools of other things, like sulfur? Is there any ...
user avatar
  • 159
3 votes
1 answer
274 views

The Solar System formation

I've recently watched one conversation (I won't post a link since the conversation is not in english) involving a physicist (at least he claims so), who spoke about probabilistic estimates of the ...
user avatar
3 votes
1 answer
137 views

Other than liquid water what factors could make way for life to be on Europa?

I know that Europa has liquid water, but I just don't know if there is anything else on it that could give way for life.
user avatar
  • 238
3 votes
2 answers
212 views

Consequences of strong wind on an alien Planet on the possibility of life

I was surprised to learn recently that Neptune has winds of 1500 miles an hour. My question is whether life could ever evolve on such a Planet that has such powerful winds? Not necessarily on ...
user avatar
  • 1,515
0 votes
1 answer
193 views

Would it be possible for life found on moon of rogue planet

I have heard that there are at least three Basic requirement for life exist in the universe, they are: Source of Energy Complex chemistry (including solvent/medium for chemical reaction) Protection ...
user avatar
  • 101
5 votes
1 answer
206 views

Will the conditions that allow life to evolve still be around in a trillion years?

Some billions of years ago, systems like the Earth couldn't emerge and therefore life couldn't arise, because not enough of the heavy elements had formed yet. Assuming there'll neither be a big ...
user avatar
  • 51
6 votes
1 answer
261 views

Proxima as Supernova

Follow this question. If a star at the same distance from us as, say, Proxima Centauri had exploded as a Supernova 4 years ago (I know, it can't explode as supernova, let's say it can)... How bright ...
user avatar
  • 113
3 votes
3 answers
171 views

Plant on large Asteroid?

I'm just curious if it is possible for a plant to survive on a large asteroid. Some say no, some say it depends. With the scenario of an asteroid at about 1 AU from the Sun, receiving a similar ...
user avatar
  • 165
3 votes
4 answers
388 views

Could the solar system survive in a void?

If the solar system were suddenly placed in the middle of a large void... would everything still function as normal? Would we even notice any difference here on Earth apart from the night sky? ......
user avatar
2 votes
1 answer
184 views

Could an Earth-like magnetic field protect life at exoplanet Proxima Centauri b?

I took a look at Wikipedia's page for Proxima Centauri b, the exoplanet that orbits Proxima Centauri, where it is said it is expected to receive 2000 times of stellar wind pressures than on Earth. It ...
user avatar
2 votes
1 answer
721 views

Could Mars have oil?

What events could have to happen to Mars (which is thought to once look like Earth) that may have depleted the atmosphere and erase all proof of life ever existing at least on the surface? I know an ...
user avatar
  • 1
0 votes
3 answers
126 views

Could some bacteria theoretically evolve to survive in space?

There is no edge to the atmosphere, and therefor I expect there would be a gradual reduction of concentrations of bacteria as we ascend into space. Logically anaerobic bacteria should be able to ...
user avatar
2 votes
4 answers
269 views

Why haven't detected life in the universe?

It would seem that if life were relatively common in the universe that there would be a cacophony of noise somewhere in the electromagnetic spectrum. Is life so rare and distant that the waves haven't ...
user avatar
3 votes
0 answers
65 views

How strong are the stellar flares on YZ Ceti?

Doing research for a game and trying to understand the implications of the stellar flares from YZ Ceti. In short (ignoring the planets for now), if people were to build large space stations of various ...
user avatar
  • 131
3 votes
1 answer
471 views

Is there enough light to grow plants in the ocean of Europa?

What is the underwater temperature of Europa? I know Jupiter emits infrared light but does it emit any light able to support plant life of any type on near by Moons? Can under water volcanic activity ...
user avatar
  • 1
6 votes
1 answer
587 views

What is the underwater temperature of Europa?

If Europa has an oxygen atmosphere with a water mantle, is it possible that there could be life under the crust of Europa ice on the ocean where it is warmer? What could be the temperature under the ...
user avatar
  • 1
1 vote
2 answers
418 views

Life on other planets

If all living things like animals require oxygen to live, how can people think that there could be life on other planets such as mars for example ? Living things require oxygen and carbon dioxide, and ...
user avatar
  • 113
0 votes
1 answer
93 views

How far can a planet with living beings get before we cannot see the living beings? [duplicate]

Let there be a planet with Earth-like life. However, no trash or monuments or other visible structures, just organisms. How far can that planet be from Earth before our equipment just cannot observe ...
user avatar
19 votes
2 answers
2k views

Whats the probability of a hazardous impact for human life on Mars?

Yesterday my sister and I have discussed the recent efforts of SpaceX to create a permanent colony on mars. When coming to the several dangers of creating a habitat on a different planet, we got ...
user avatar
  • 291
2 votes
1 answer
113 views

Could Earth have been seeded with life? [closed]

The earliest life on Earth is thought to have began shortly after its formation (a few hundred million years after, by fossil evidence, and this while the late heavy bombardment was raging). With the ...
user avatar
  • 179
1 vote
1 answer
132 views

What types of star do we know are hostile to life (like ours)?

Certainly all stars have enough energy for a planet to host life. But a more magnetically active star is not preferred because solar ejection could strip planets of their atmosphere. What's the right ...
user avatar
-1 votes
2 answers
143 views

Can aliens possibly be around us?

I've heard somewhere that when we observe distant galaxies, we actually look into the past. For example, if a planet is 3 million light years away from us, it means that we observe its state as it was ...
user avatar
1 vote
3 answers
414 views

Can life on earth be supported by only a Red Dwarf star or a White Dwarf(state still hot not cooled enough yet)?(Provided it is near to the star)

Can a red dwarf star or a white dwarf have enough energy to support life on earth? How it will change the climate and the seasons of earth if it is our only star? (energy source)(Expecting it to ...
user avatar
1 vote
1 answer
74 views

Ideal conditions for life [closed]

Is Earth the perfect place for life ? If it isn't then how could conditions be better here ? For example, the size of the Planet, our atmosphere, distanace from our Sun etc.
user avatar
  • 1,515
3 votes
3 answers
5k views

How close would the sun have to get to Earth for there to be severe consequences?

According to earthsky.org the Earth gets 3 million miles closer to the Sun than its usual distance of about 93 million miles on average. My question is, how close would the earth have to be to the ...
user avatar
  • 1,029
2 votes
0 answers
94 views

Life in sufficiently hot rogue planets [closed]

The Milky Way has a bright center we can't see directly because of space dust. Are there's regions of the galaxy free of that dust that could receive all that light and radiation, right? Would it be ...
user avatar
2 votes
2 answers
496 views

How does space time differ within a galaxy?

Not the same question but is similar to other marked duplicate. How much time dilation does the center of a galaxy can exist and sustain human life from our point of view? What would a day equal to ...
user avatar
  • 1
1 vote
1 answer
3k views

Could life survive on a planet orbiting a neutron star? [closed]

Suppose an Earth-like planet orbits a neutron star, though specifically not a pulsar. Is there any possible orbit, around any possible neutron star, in which the planet could support human life?
user avatar
3 votes
2 answers
435 views

What if we are looking for the wrong signs of life on other planets?

I am by no means an astronomy expert, having only taken 2 semesters in college. But I am an avid follower of news reports that look for signs of life on other planets. Today it was announced that 20 ...
user avatar
5 votes
1 answer
876 views

Why are ice giants not considered suitable for life?

Ice giants are currently not considered suitable for life due to temperature, pressure and composition. This paper gives some parameters for life in regards to temperature, pressure and composition: ...
user avatar
-1 votes
1 answer
85 views

What questions will we be able to answer if we find life on other celestial bodies? [closed]

Will that be able to answer questions such as our origins or why we exist? Will it unlock some sort of new perception towards anything?
user avatar