3/31 Astro

Why was betelgeuse dimming

dust coming from atmosphere

Where do magnetic field lines extend away from sun

coronal holes

what makes the solar wind

charged particles that float away

what makes tails of comets

solar wind

sunspots

cooler areas in photosphere

interstellar medium

gas and dust between stars

interstellar extinction

dust blocks visible light from stars

extinction, reddening

fainter, redder

reddening

dust blocks short blue wavelengths but not red ones

what produces absorbtion line spectra

intercloud gas

where do stars form

molecular clouds

obiect at center of disk

protostar

are protostars easily observable?

no, cool and buried in dense clouds

protostar is always in

hydrostatic equilibrium

Molecular cloud, gravitational collapse, fragmentation into dense cores, collapsing molecular cloud core, protostar, protostar heats and contracts, hydrogen fusion begins, main-sequence star

star clusters

gravitationally bound group of stars

is betelgeuse on main sequence

no, red supergiant, late stage

What does dust in space do to the light given off by stars

absorbs and scatters light, dimmer and redder

Explain why viewing the sky through multiple different light spectra helps us understand how stars form

different wavelengths show different materials, temps, structures hidden by dust

Stars are considered fully developed when they can burn what?

hydrogen

do heavier more massive stars take longer to form?

yes