# Astronomical ABCD…!

Today, I thought to make a list of Astronomical objects, A to Z.

It goes as follows :

• A - Asteroid
• B - Black Hole
• C - Comet
• D - Dwarf Planet
• E - Elliptical Galaxy
• F - Falling Star
• G - Globular Cluster
• H - Hypergiants (Stars)
• I - Interstellar Medium
• J - Jets (Astrophysical)
• K - $\color{red} ?$
• L - Lenticular Galaxy
• M - Meteor
• N - Nebula
• O - Open Cluster
• P - Pulsar
• Q - Quasar
• R - Rogue Planets
• S - Satellites
• T - $\color{red} ?$
• U - Universe
• V - Variable Star
• W - White Dwarf
• X - X-ray Star
• Y - Yellow dwarf star
• Z - $\color{red} ?$

But I couldn't think of something well-known from the letters K, T and Z.

I tried to avoid using name of something specific object for ex. K - Kuiper Belt.

Thanks!

• I'm voting to close this question as off-topic because it's not really a question about the science of astronomy. – HDE 226868 Nov 16 '17 at 14:46
• @HDE226868: This seems like an outreach effort. I think we can support that. – AtmosphericPrisonEscape Nov 16 '17 at 14:47
• @AtmosphericPrisonEscape I'm worried about the list aspect of this question. That said, the OP does have some pretty hard letters to fill. My suggestion for K is "kick" as in pulsar kick or black hole kick. – called2voyage Nov 16 '17 at 14:58
• Check out this A to Z of astronomy Jaideep. – John Duffield Nov 16 '17 at 16:47
• @AtmosphericPrisonEscape It's also, as called2voyage said, kind of broad. – HDE 226868 Nov 18 '17 at 3:27

Seems a little contrived, essentially you just have to dig deep enough to find a specific enough category that matches the letter. But here you go :

K - KBO (Kuiper Belt Object) , if you still don't like that you could use

K - Kreutz Sungrazer (A type of comet, https://en.wikipedia.org/wiki/Kreutz_sungrazer)

T - T-Tauri Star (A type of variable star, https://en.wikipedia.org/wiki/T_Tauri_star)

Z - Z Camelopardalis star (https://en.wikipedia.org/wiki/Z_Camelopardalis_star redirects to Dwarf Nova, scroll down)

• +1 Excellent! – uhoh Nov 17 '17 at 0:42

for K we have Kilonova - a "transient astronomical event that occurs in a compact binary system when two neutron stars or a neutron star and a black hole merge into each other". On 17 August 2017, a gravitational wave detection coinciding with a kilonova made a big news as the first such observation and an important milestone in science.

My suggestions for T are less good. TAU was a space probe proposed in 1987. Not exactly an astronomical body, though, and rather unknown. If you don't mind constellations, Taurus would be my go-to suggestion.

As for Z, my best suggestion would be Zeta Orionis - a star system in the Orion's belt. Its primary star is the brightest Class O star in the night sky. Also known as Alnitak.

• He seems to be looking for types of objects, not the names of specific objects. Otherwise there are lots of stars with names beginning with Zeta. – Barmar Nov 16 '17 at 22:35
• I mostly posted for the kilonovae. Also this is why I said my T and Z suggestions weren't that great. – John Dvorak Nov 16 '17 at 22:37

Z - Zodiacal light

T - why not T-dwarf ?

K - err K-dwarf or K-giant if you want variety.

I think your F is a bit lame. You could go for FU Ori object.

• The problem is, that Zodiacal Light isn't any Astronomical object. Btw, thanks for your answer! (+1) – Jaideep Khare Nov 16 '17 at 19:53
• Call it Zodiacal Dust then. @JaideepKhare – ProfRob Nov 16 '17 at 21:10