I am sharing links of all important Summer Schools or Visiting student Research Programs accepting applications now. If you're interested, check for the deadlines and apply soon. (There are different eligibility criteria and registration deadlines). Moreover, most of applications are asking on average* two recommendation letters.
Please check it all:
- India :
1.) ARIES- ATSOA:
https://www.aries.res.in/~atsoa/
2.) IIA Summer Physics School:
https://www.iiap.res.in/solar_school/
3.) NCRA VSRP:
http://www.ncra.tifr.res.in/ncra/ncra/visiting-students-research-programme-2019/ http://vsrp.ncra.tifr.res.in/VSRP2019/candidate/welcome.ncra
4.) TIFR VSRP- 2019:
http://www.tifr.res.in/~vsrp/
5.) IIA VSP:
https://www.iiap.res.in/visiting_student_app/
6.) IUCAA VSP:
http://www.iucaa.in/Stu-Prog-VSP.html
7.) ICTS Summer:
https://www.icts.res.in/academic/summer-research-program
8.) ICTS long term VSP:
https://www.icts.res.in/academic/ltvsp
9.) IISER Pune summer program:
http://www.iiserpune.ac.in/~sspc/
10.) Summer School for Women:
https://www.icts.res.in/program/swms2019
11.) Bose Institute Summer Program: Link to be announced soon
12.) S.N Bose National Centre for Basic Sciences: Link to be announced soon.
(Few more I will add as Institutes launch website)
- Abroad :
13.) LIGO- Indigo Summer Student Program:
http://www.gw-indigo.org/tiki-read_article.php?articleId=108
14.) LIGO- undergraduate: https://labcit.ligo.caltech.edu/LIGO_web/students/SURF/apply/apply.shtml
15.) REU- LASP Summer Program:
http://lasp.colorado.edu/home/education/reu/
16.) LPI Summer Intern:
https://www.lpi.usra.edu/lpiintern/
17.) LIGO- Indigo Summer Research:
http://www.gw-indigo.org/tiki-read_article.php?articleId=101
18.) Summer Associate Program:
https://www.ida.org/en/CareersAtIDA/SummerAssociates.aspx
19.) Aspen Summer Program: https://www.aspenphys.org/physicists/summer/program/currentworkshops.html
20.) CERN Summer Program:
https://jobs.smartrecruiters.com/CERN/743999679008913-cern-openlab-summer-student-programme
21.) ASTRON/JIVE Summer program:
http://www.astron.nl/astronomy-group/astronjive-summer-student-programme
22.) Summer Science Program:
https://summerscience.org/
23.) NASA Summer Undergraduate Program:
https://www.lpi.usra.edu/suppr/eligibility/
24.) NRAO Summer student research assistantship:
https://science.nrao.edu/opportunities/student-programs/summerstudents
25.) Kavli Summer Program in Astrophysics:
https://kspa.soe.ucsc.edu/home
26.) YALE Summer Program in Astrophysics:
https://yspa.yale.edu/