G299 middle-aged supernova remnant left over by a particular class called Type Ia

size: 594938
sha1: e39427fd6f1b478b8afa63d37508b4cf997542e0
sha256: f20a878c98010b740070c4a5d5bb0d20702184564159cd7e7436c88f1f5b31d8
sha256 base64: 8gqHjJgBC3QAcMSl1bsNIHAhhFZBWc1+dDbIjx9bMdg=

size: 591068
sha1: 539484d3a23f7eed629d73741b865f0e63db8fba
sha256: f5360b88599ed606722174ec09cb52587272012b5891a29f52efb0fcc09d455c
sha256 base64: 9TYLiFme1gZyIXTsCctSWHJyAStYkaKfUu+w/MCdRVw=