Current topics on Radio Astronomy and looking for advice Background and Question: I'm an undergraduate student interested on Radio Astronomy. I consider myself enthusiastic about it and I project myself following this &quot;path&quot; so I'd like, apologizing myself if this is a naive question, to ask you, more experienced astronomers, what are the current topics being part of research in Radio Astronomy.
My thoughts:

I know Cosmology and CMB Measurements are something that will keep its route for a long time as huge projects continue being developed.
Also I'd say Radio-loud Galaxies are something that Radio Astronomers are putting lots of work into.
Interferometric techniques, data reduction algorithms and image synthesis.
Astro-Chemistry and the study of spectral lines using data cubes such as provided by ALMA.

More questions:

Am I wrong with any of the topics listed? What else is being done now?
How do you see this in the next 5 - 10 - 20 years ?
Considering I want to work on my thesis project this year, what would you recommend (or to other undergrad. students) ? What would be a &quot;good route&quot; to follow after graduating? (my grades to this date are at ~ 80%).
Here are some examples that you can read about within Astronomy SE and Space SE:
Time Domain Astronomy (link)
e.g. LOFAR and (as it turns out) CHIME. Think better FRB detection gravitational lensing effects on pulsar timing (needs several questions of its own)

Why did it take five years to &quot;figure out&quot; how to use astrometric calibration sources to deblur LOFAR images?
Open dataset from antenna array

and

How tightly clustered are the CHIME-detected FRB repeats?
What are the challenges for the building and data analysis of the CHIME telescope?
How does Canada&#39;s radiotelescope CHIME manage polarization-dependent apodization of the fast f/0.25 optics?
What will succeed the Arecibo Observatory?

also

What exactly is interplanetary scintillation; what was the Interplanetary Scintillation Array looking for? Did it successfully observe any?

Space based, and Satellite VLBI

Far Side of the Moon stuff, e.g. Chang'e 4: The NCLE on the orbiter and the LFS on the lander work in synergy performing low-frequency (0.1–80 MHz) radio astronomical observations.
What can be learned from low frequency radio astronomy available outside of Earth&#39;s ionosphere?
Has VLBI been done using any space-based receivers besides Spektr-R? (Space SE)
What's the status and timeline for Millimetron? (Russia's 10m Deployable Antenna cooled to 6 K Earth-Space VLBI) (Space SE)
What are Spectr-R's major contributions to radio astronomy that could not have been done from Earth? (Space SE)
How is Spektr-R doing these days? (Space SE)
Has VLBI been done using any space-based receivers besides Spektr-R? (Space SE)
What kind of ground-based radio astronomy is NASA's DSN used for? Who are the PIs? (Space SE)
Are images of exoplanets' surfaces technically possible? (Space SE)
Could a radio telescope orbit Earth-Moon L2 so that it is in the Moon's radio shadow?
Rotating liquid mirror on the Moon: this answer to Why can't we build a huge stationary optical telescope inside a depression similar to the FAST?

Fancy, complicated focal plane arrays and techniques

How would a Fast Fourier Transform Telescope work without a mirror, dish or lenses?
How do ASKAP&#39;s focal plane phased array feeds interact with the entire array phasing?
What is the highest granularity focal-plane array on a dish radio telescope? Or is this the ONLY ONE?
Would Adaptive Optics be Useful in Radio Astronomy?
Has radio astronomy ever been done on objects that appear very close to the Moon? Is this avoided?

Radar Astronomy (link)

What are recent discoveries with Earth-based radar telescopes?
What will succeed the Arecibo Observatory?
What causes &quot;North-South ambiguity&quot; when doppler radar imaging a planet surface equator on?
https://space.stackexchange.com/q/22493/12102
What is the physical geometry of this apparent &quot;eclipse&quot; of a tiny moon of Asteroid Florence?
Farthest distance to a solar system object that's been measured by radar? (Space SE)
How did Arecibo detect methane lakes on Titan, and image Saturn's rings? (Space SE)
Why is Saturn invisible in this radar image of its rings? (Space SE)
Why was the 100m Green Bank dish needed together with DSN's 70m Goldstone dish to detect Chandrayaan-1 in lunar orbit? (Space SE, not exactly Astronomy but pretty cool from an instrumentation and signals point of view)
Why are Titan's lakes “black” in radar images rather than transparent? (Space SE)
Is delay-doppler radar imaging of NEO asteroids possible only if it spins fast enough? (Space SE)
Separating fact from fiction, how to get from this radar image to this GIF? (Space SE)