div class=trans-pagebutton class=gotoPage data-page=1Page 1button div class=trans-imagea href=https:reader043fdocumentsinreader043viewer20220412015d47f6e688c99316638b6cddhtml5page1jpg target=_blank img data-url=documentis-rarely-used-by-astronomers-it-does-not-refer-only-to-harmful-energy-what-canhtmlpage=1 data-page=1 class=trans-thumb lazyload alt=Page 1: sb69a5660a1945818jimcontentcom fileIt is rarely used by astronomers It does not refer only to harmful energy What can be inferred about two stars if their spectra have similar loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR42mM8Uw8AAh0BTZud3BwAAAAASUVORK5CYII= data-src=https:reader043fdocumentsinreader043viewer20220412015d47f6e688c99316638b6cddhtml5thumbnails1jpg width=140 height=200 adivdivdiv class=trans-pagebutton class=gotoPage data-page=2Page 2button div class=trans-imagea href=https:reader043fdocumentsinreader043viewer20220412015d47f6e688c99316638b6cddhtml5page2jpg target=_blank img data-url=documentis-rarely-used-by-astronomers-it-does-not-refer-only-to-harmful-energy-what-canhtmlpage=2 data-page=2 class=trans-thumb lazyload alt=Page 2: sb69a5660a1945818jimcontentcom fileIt is rarely used by astronomers It does not refer only to harmful energy What can be inferred about two stars if their spectra have similar loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR42mM8Uw8AAh0BTZud3BwAAAAASUVORK5CYII= data-src=https:reader043fdocumentsinreader043viewer20220412015d47f6e688c99316638b6cddhtml5thumbnails2jpg width=140 height=200 adivdiv