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The different appearances exhibited by coronal mass ejections (CMEs) arebelieved to be in part the result of different orientations of their main axisof symmetry, consistent with a flux-rope configuration. There are observationalreports of CMEs seen along their main axis (axial perspective) andperpendicular to it (lateral perspective), but no simultaneous observations ofboth perspectives from the same CME have been reported to date. Thestereoscopic views of the telescopes onboard the $Solar$-$Terrestrial$$Relations$ $Observatory$ (STEREO) twin spacecraft, in combination with theviews from the $Solar$ $and$ $Heliospheric$ $Observatory$ (SOHO) and the$Solar$ $Dynamics$ $Observatory$ (SDO), allow us to study the axial and lateralperspectives of a CME simultaneously for the first time. In addition, thisstudy shows that the lateral angular extent ($L$) increases linearly with time,while the angular extent of the axial perspective ($D$) presents this behavioronly from the low corona to $\approx\,$5 $R_{\odot}$, where it slows down. Theratio $L/D \approx\,$1.6 obtained here as the average over several points intime is consistent with measurements of $L$ and $D$ previously performed onevents exhibiting only one of the perspectives from the single vantage pointprovided by SOHO.

First Simultaneous Views of the Axial and Lateral Perspectives of a Coronal Mass Ejection