ESP
Capturing an actual image where you could see both the host star and an extrasolar planet would be this type of detection.
What is direct detection?
Think on it: this type of nebula occurs when blue light from young stars gets scattered toward us.
What is a reflection nebula?
About 90% of all stars lie in this region of the HR Diagram.
What is the Main Sequence?
Of molecular gas, neutral gas, and ionized gas, this is the most common constituent of the ISM by mass.
What is neutral gas?
(Or what is HI?)
At a Minimum, this astronomer studied the Sun and found the period of sunspot activity and the pattern known as the Butterfly Diagram.
Who was Maunder?
This indirect technique uses tiny shifts in the absorption lines of a star to surmise the presence of a planet.
What is the Doppler Method?
(Or, what is the Radial Velocity Method?)
This type of nebula occurs when newborn stars ionize the gas surrounding them.
What is an emission nebula?
(Or HII region!)
These objects are actually the small, very hot remains of most stars. They lie toward the bottom left of the HR Diagram.
Of molecular gas, neutral gas, and ionized gas, this phase of the ISM takes up the most volume of the Milky Way.
What is ionized gas?
OBAFGKM! This astronomer established the stellar sequence still in use today.
Who was Annie Jump Cannon?
The Kepler satellite found thousands of extrasolar planets using this indirect technique.
What is the Transit Method?
(or, using eclipses)
This famous emission nebula is associated with the sword of this constellation.
What is the Orion Nebula?
This Roman numeral is used to indicated the spectral class of stars that lie on the Main Sequence.
What is V?
Stars are born from clouds of this type of ISM.
What is molecular gas?
(stars are born in molecular clouds)
Edward Pickering's maid, this first "computer" started the standard of classifying stars by their hydrogen absorption features.
Who was Williamina Fleming?
This satellite is providing precise data on many nearby stars; it is capable of finding extrasolar planets by the tiny shifts in position they cause for their host stars.
What is the Gaia satellite?
The Sun will eventually form this type of nebula; that phase will only last about 10,000 years, though.
What is a planetary nebula.
These stars are cool but very large. They reside to the right of the HR Diagram.
What are Red Giants?
This constituent of the ISM shields molecular clouds from the radiation of starlight which would break up its molecules.
What is dust?
The first female recipient of a PhD from Harvard College Observatory, she determined that the Sun was composed mostly of hydrogen and helium.
Who was Cecilia Payne-Gaposchkin?
This was the first extrasolar planet detected by the Doppler Technique, and led to Mayor & Queloz being awarded a Nobel Prize.
What is 51Pegasi b?
(Or just 51 Peg)
The Crab Nebula, whose progenitor event was observed by Chinese astronomers in 1054 AD, is this type of remnant.
What is a supernova?
Stars along this arboreal-sounding portion of the HR Diagram are in a brief stable phase where their cores are fusing helium into carbon.
What is the Horizontal Branch?
Ewen and Purcell made the "horn" and equipment that first detected this, the fine structure line of hydrogen associated with this wavelength of light.
What is 21 cm?
Hold a press conference! This Harvard College Observatory woman studied variable stars and found the "period-luminosity" relation which helped unlock the distance scale of the Universe
Who was Henrietta Leavitt?