text: 32,179,1285492962672222208,28378010,Paul A. Strøm,"Our new paper is out on arXiv today: ""Exocomets from a Solar System Perspective"" <LINK> In this topical review paper we provide an overview of the observational properties of Solar System #comets and #exocomets. (1/10) <LINK> The paper aims to highlight commonalities and to discuss differences which may aid the communication between the involved research communities and perhaps also avoid misconceptions. (2/10) A major difference between the observations of Solar System #comets and #exocomets is that the former are studied individually, whereas the latter generally cannot be resolved. Compared to Solar System comets, the information we have about exocomets is very limited. (3/10) Yet there are hints that they may not be too different in composition... 😱 (4/10) Observations of gas around main sequence stars, spectroscopic observations of ""polluted"" white dwarf atmospheres and spectroscopic observations of transiting exocomets suggest that exocomets may show compositional similarities with Solar System comets. (5/10) For instance, the CaII lines commonly seen in the spectra of beta Pic and polluted WDs have been detected in the extreme case of the large sungrazing comet C/1965 S1 Ikeya-Seki. (6/10) Solar system comets emit in high energy EUV and X-ray emission through the gradual neutralisation of highly charged solar wind ions. Similar processes are also thought to occur at exocomets encountering stellar winds (as seen by the variations of highly ionised species). (7/10) Observations of interstellar visitors such as 1I/`Oumuamua and 2I/Borisov allow us to learn about the physical and chemical properties of protoplanetary disks of distant stars, although their true systems of origin are unknown to us. (8/10) This raises the tantalising prospect that observations of interstellar comets may help bridge the fields of exocomet and Solar System comets. (9/10) If you have a an interest in debris disks, white dwarf atmospheres and/or (exo)comets, this paper will likely be of interest to you. It is also the first time I publish as a first author under my new surname: Strøm. Enjoy! (10/10)",https://arxiv.org/abs/2007.09155,"Exocomets are small bodies releasing gas and dust which orbit stars other than the Sun. Their existence was first inferred from the detection of variable absorption features in stellar spectra in the late 1980s using spectroscopy. More recently, they have been detected through photometric transits from space, and through far-IR/mm gas emission within debris disks. As (exo)comets are considered to contain the most pristine material accessible in stellar systems, they hold the potential to give us information about early stage formation and evolution conditions of extra Solar Systems. In the Solar System, comets carry the physical and chemical memory of the protoplanetary disk environment where they formed, providing relevant information on processes in the primordial solar nebula. The aim of this paper is to compare essential compositional properties between Solar System comets and exocomets. The paper aims to highlight commonalities and to discuss differences which may aid the communication between the involved research communities and perhaps also avoid misconceptions. Exocomets likely vary in their composition depending on their formation environment like Solar System comets do, and since exocomets are not resolved spatially, they pose a challenge when comparing them to high fidelity observations of Solar System comets. Observations of gas around main sequence stars, spectroscopic observations of ""polluted"" white dwarf atmospheres and spectroscopic observations of transiting exocomets suggest that exocomets may show compositional similarities with Solar System comets. The recent interstellar visitor 2I/Borisov showed gas, dust and nuclear properties similar to that of Solar System comets. This raises the tantalising prospect that observations of interstellar comets may help bridge the fields of exocomet and Solar System comets. ",Exocomets from a Solar System Perspective,10,"['Our new paper is out on arXiv today: ""Exocomets from a Solar System Perspective"" <LINK>\n\nIn this topical review paper we provide an overview of the observational properties of Solar System #comets and #exocomets. (1/10) <LINK>', 'The paper aims to highlight commonalities and to discuss differences which may aid the communication between the involved research communities and perhaps also avoid misconceptions. (2/10)', 'A major difference between the observations of Solar System #comets and #exocomets is that the former are studied individually, whereas the latter generally cannot be resolved. Compared to Solar System comets, the information we have about exocomets is very limited. (3/10)', 'Yet there are hints that they may not be too different in composition... 😱 (4/10)', 'Observations of gas around main sequence stars, spectroscopic observations of ""polluted"" white dwarf atmospheres and spectroscopic observations of transiting exocomets suggest that exocomets may show compositional similarities with Solar System comets. (5/10)', 'For instance, the CaII lines commonly seen in the spectra of beta Pic and polluted WDs have been detected in the extreme case of the large sungrazing comet C/1965 S1 Ikeya-Seki. (6/10)', 'Solar system comets emit in high energy EUV and X-ray emission through the gradual neutralisation of highly charged solar wind ions. Similar processes are also thought to occur at exocomets encountering stellar winds (as seen by the variations of highly ionised species). (7/10)', 'Observations of interstellar visitors such as 1I/`Oumuamua and 2I/Borisov allow us to learn about the physical and chemical properties of protoplanetary disks of distant stars, although their true systems of origin are unknown to us. (8/10)', 'This raises the tantalising prospect that observations of interstellar comets may help bridge the fields of exocomet and Solar System comets. (9/10)', 'If you have a an interest in debris disks, white dwarf atmospheres and/or (exo)comets, this paper will likely be of interest to you. It is also the first time I publish as a first author under my new surname: Strøm. Enjoy! (10/10)']",20,07,2115