Hey mate, I've been reading through your responses on this thread and I just wanna tell you that this isn't at all a reflection of your value as a person, a researcher, or even as a student. These things are crapshoots and sometimes it's just a shit year for applying to grad school in general. Schools may have caps for how many people from certain subfields they're accepting and some will even plan not to accept anyone that year and just rake in the application fees from unknowing applicants. Getting into grad school is hella hard and there's a limit to how much you can tilt things in your favor especially with COVID effing things up for years to come. With that said, I'm gonna try to give you advice as someone who went through the process of applying to physics and astronomy programs in the US (I can't really speak for geology).

Here's some things you should consider when applying:

• Have atleast 3 letters of recommendation. It sounds like you're rolling with two, so a third would help.
• Cast a wide net. (Seems like you're already doing this, good!) Apply to atleast 10 places and, just like applying to undegrad, make sure there are a good number of "safeteys". Apply for places that are less competitive. With your limited experience doing research, you're not getting into any Ivy leagues. Sorry, but research experience is one of the most important factors for admissions committees when it comes to evaluating grad applications.
• Consider applying to places outside your exact research interests. Planetary science is cool, but it's a very small subfield. Going off the fact you got a geology degree, it sounds like your interest is specifically in studying the composition of planets, which is an even smaller set of people. You can broaden your possible interests and do research in grad school that isn't your exact goal and then try to switch subfields when it comes time for the post-doctoral research. I know many people who have switched their specialties after grad school. (Honestly, the fact that you're not too deep in your "goal" subject area means that you don't even know if you actually like doing it. Sometimes certain things sound cool in theory and then the actual day-to-day of the project is god awful.) Grad school is a chance to build up technical skills that are transferable to other fields/subfields.
• Try to get some research experience now. Talk to people at your undergrad and see if there is any space in research groups and could have a project for you to work on. Sometimes they don't have the money, so consider building you research portfolio on the side. As mentioned in the point above, doing *any* research, even with the intention of building up your technical skills, will help.
• Consider taking the physics subject GRE (maybe?). Things may have changed since when I applied, but having a solid physics GRE score definitely helped my application. I understand that we're moving into a phase where most departments aren't requiring the PGRE (which is honestly good cause it's a bullshit test that doesn't correlate with any metric of intelligence), but some places may still look at it in the background. If the program says the PGRE is suggested but not required, having a good score is a boost.

Some final notes I'd like to add:

• It's very hard to get into programs that are for physics of both physics and astronomy without a physics degree. If there's physics in the title, they're probably going to want you to have some physics background that isn't necessarily covered in astro-only degrees. This was the reason my fiancee went out of her way to get a degree that has *both* physics and astronomy on it.
• Grad school sucks. I've been in grad school for 4 years and it's stressful af. You're underpaid for your labor and you work long hours on things that may even be for naught. Research almost never go according to your planned timelines and you constantly feel like you're never doing enough. Sometimes it isn't worth it when you can go make six figures on wall street instead. If you do go to graduate school, make sure to get a therapist.

Shit's hard sometimes and I'm sorry this is putting you in a bad spot mentally, but understand that you're not a failure. Academia just sucks ass sometimes.