Protostar
Early stage in the process of star formation
A protostar is a very young star that is still gathering mass from its parent molecular cloud. It is the earliest phase in the process of stellar evolution. For a low-mass star (i.e. that of the Sun or lower), it lasts about 500,000 years.
Nº Q204903 ★★
Uncommon · Knowledge
Protostar
Early stage in the process of star formation
A protostar is a very young star that is still gathering mass from its parent molecular cloud. It is the earliest phase in the process of stellar evolution. For a low-mass star (i.e. that of the Sun or lower), it lasts about 500,000 years.
Last price
—
Floor price
—
7-day median
—
30-day sales
0
30-day range
—
In circulation
0
Price history
median
low – high
sales
No sales in this period
Show table
| Date | median | Low | High | sales |
|---|
Sales history
- Last sale
- —
- 30-day average
- —
- 30-day low
- —
- 30-day high
- —
- Sales 7d
- 0
- Sales 30d
- 0
No sales yet.
Anonymous sales: no buyer or seller shown. Figures count player-to-player sales only.
From Wikipedia
A protostar is a very young star that is still gathering mass from its parent molecular cloud. It is the earliest phase in the process of stellar evolution. For a low-mass star (i.e. that of the Sun or lower), it lasts about 500,000 years. The phase begins when a molecular cloud fragment first collapses under the force of self-gravity and an opaque, pressure-supported core forms inside the collapsing fragment. It ends when the infalling gas is depleted, leaving a pre-main-sequence star, which contracts to later become a main-sequence star at the onset of hydrogen fusion producing helium.
Text: Wikipédia, CC BY-SA 4.0. · Image: ESA/Hubble & NASA Acknowledgement: Judy Schmidt (CC BY 4.0) ·
Related cards
Stellar evolution
Changes to a star over its lifespan
Nº Q6472 ★★★★
Proton–proton chain
One of the fusion reactions by which stars convert hydrogen to helium
Nº Q223073 ★★★
Local Interstellar Cloud
Interstellar cloud in the Milky Way Galaxy
Nº Q817157 ★★
Asymptotic giant branch
Stars powered by fusion of hydrogen and helium in shell with an inactive core of carbon and oxygen
Nº Q50089 ★★
Star cluster
Large group of stars
Nº Q168845 ★★
Hertzsprung–Russell diagram
Scatter plot of stars showing the relationship between the stars' absolute magnitudes (luminosities or brightness) versus their effective temperatures (stellar classifications or colour)
Nº Q3270143 ★★★