<p>Coronal Mass ejections are not easy to detect from Earth (until they hit the ionosphere and cause a geomagnetic storm)  The first was discovered by a space-based solar observatory in 1971. They are, however easily visible to spacecraft.</p>
<p>Flares, on the other hand, are the explosions of magnetic energy in the Sun's atmosphere. They emit X-rays, ultraviolet, and even ordinary light in all directions, and are visible from Earth, as a &quot;flash of light&quot;.  The atmosphere blocks/protects us from the X-rays, so they are easier to detect from space too.  And large flares often cause mass ejections, but the two phenomena are distinct.</p>
<p>The matter in a CME interacts with the solar wind (it can be moving either faster or slower than the wind, but will change speed to match the wind), and eventually becomes part of the solar wind. It travels away from the sun, eventually slowing down at the heliopause.  Ultimately the matter becomes part of the interstellar medium.</p>

CC BY-SA 4.0
2023-01-14T18:44:48.547Z
Coronal mass Ejections are easily detectable by spacecraft as they are produced.
ProfRob
CC BY-SA 4.0
2024-01-17T13:52:44.770Z
We can observe CMEs with SOHO and SDO quite easily.  We can infer them from Type II radio bursts observed by Wind, STEREO, Parker Solar Probe, and Solar Orbiter.
honeste_vivere
CC BY-SA 4.0
2023-01-14T13:20:43.037Z
2023-01-14T21:34:09.170Z
2023-01-14T21:34:09.170Z
James K
<p>Due to magnetic fluctuations in the Sun's corona, the Sun produces Coronal Mass ejections (CMEs).</p>
<p>Where does the matter from these CMEs go if they don't hit any celestial object? Are they visible from Earth?</p>

CC BY-SA 4.0
2023-01-14T13:02:48.680Z
I suspect you mean "coronal mass ejections".   Flares are bright Ultraviolet and X-ray emissions and like other forms of light, the light just goes out into space.  Coronal mass ejections can be triggered by flares.
James K
CC BY-SA 4.0
2023-01-14T13:48:06.143Z
@JamesK Or perhaps the OP is asking about the solar wind. It is rather unclear what's being asked given the unclear and grammatical incorrect way the question was written.
David Hammen
CC BY-SA 4.0
2023-01-14T13:53:55.333Z
I'm sorry for mistakes,  i mean CME(coronal mass ejections)
Tapan Gupta
CC BY-SA 4.0
2023-01-15T05:01:29.473Z
They hit Moon and other celestial objects: https://physics.stackexchange.com/a/715486/85785
Nilay Ghosh
CC BY-SA 4.0
2023-01-15T06:40:05.720Z
Space is Really, Really, **Really Big**, and it's Really, Really, **Really Empty**.  Most just hurdle out into the **unimaginably huge and empty void**.
RonJohn
<the-sun><solar-flare><coronal-mass-ejection>
Where do Coronal Mass Ejections go?
Tapan Gupta
# Where do Coronal Mass Ejections go?

(Asked by: username_0 on 2023-01-14)

Due to magnetic fluctuations in the Sun's corona, the Sun produces Coronal Mass ejections (CMEs).

Where does the matter from these CMEs go if they don't hit any celestial object? Are they visible from Earth?

**Tags:** the-sun, solar-flare, coronal-mass-ejection
> **Comments:**
> **username_1**: I suspect you mean "coronal mass ejections".   Flares are bright Ultraviolet and X-ray emissions and like other forms of light, the light just goes out into space.  Coronal mass ejections can be triggered by flares.  
> **username_2**: @JamesK Or perhaps the OP is asking about the solar wind. It is rather unclear what's being asked given the unclear and grammatical incorrect way the question was written.  
> **username_0**: I'm sorry for mistakes,  i mean CME(coronal mass ejections)  
> **username_3**: They hit Moon and other celestial objects: https://physics.stackexchange.com/a/715486/85785  
> **username_4**: Space is Really, Really, **Really Big**, and it's Really, Really, **Really Empty**.  Most just hurdle out into the **unimaginably huge and empty void**.  

---

## 1 answers

### Answer by username_1 on 2023-01-14. Score: 7

Coronal Mass ejections are not easy to detect from Earth (until they hit the ionosphere and cause a geomagnetic storm) The first was discovered by a space-based solar observatory in 1971. They are, however easily visible to spacecraft.

Flares, on the other hand, are the explosions of magnetic energy in the Sun's atmosphere. They emit X-rays, ultraviolet, and even ordinary light in all directions, and are visible from Earth, as a "flash of light". The atmosphere blocks/protects us from the X-rays, so they are easier to detect from space too. And large flares often cause mass ejections, but the two phenomena are distinct.

The matter in a CME interacts with the solar wind (it can be moving either faster or slower than the wind, but will change speed to match the wind), and eventually becomes part of the solar wind. It travels away from the sun, eventually slowing down at the heliopause. Ultimately the matter becomes part of the interstellar medium.

> **Comments:**
> **username_5**: Coronal mass Ejections are easily detectable by spacecraft as they are produced.  
> **username_6**: We can observe CMEs with SOHO and SDO quite easily.  We can infer them from Type II radio bursts observed by Wind, STEREO, Parker Solar Probe, and Solar Orbiter.  

---

